diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3ed72cfa669..4b7d56f03b1 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -62,7 +62,7 @@ jobs:
           submodules: recursive
       - uses: dart-lang/setup-dart@e630b99d28a3b71860378cafdc2a067c71107f94
         with:
-          sdk: stable
+          sdk: beta
       - name: Fetch Dart dependencies
         run: dart pub get
       - name: Check if excerpts are up to date
@@ -88,7 +88,7 @@ jobs:
         run: pnpm install --frozen-lockfile
       - uses: dart-lang/setup-dart@e630b99d28a3b71860378cafdc2a067c71107f94
         with:
-          sdk: stable
+          sdk: beta
       - name: Fetch Dart dependencies
         run: dart pub get
       - name: Build site
@@ -108,7 +108,7 @@ jobs:
           submodules: recursive
       - uses: dart-lang/setup-dart@e630b99d28a3b71860378cafdc2a067c71107f94
         with:
-          sdk: stable
+          sdk: beta
       - name: Fetch Dart dependencies
         run: dart pub get
       - name: Validate the firebase.json file
diff --git a/examples/_animation/basic_hero_animation/pubspec.yaml b/examples/_animation/basic_hero_animation/pubspec.yaml
index 5d1ded3956f..dc6089ff586 100644
--- a/examples/_animation/basic_hero_animation/pubspec.yaml
+++ b/examples/_animation/basic_hero_animation/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
   Shows how to create a simple or Hero animation using the Hero class directly.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/_animation/basic_radial_hero_animation/lib/main.dart b/examples/_animation/basic_radial_hero_animation/lib/main.dart
index 312a8aa75b0..cd41fff10ba 100644
--- a/examples/_animation/basic_radial_hero_animation/lib/main.dart
+++ b/examples/_animation/basic_radial_hero_animation/lib/main.dart
@@ -22,7 +22,7 @@ class Photo extends StatelessWidget {
     return Material(
       // Slightly opaque color appears where the image has transparency.
       // Makes it possible to see the radial transformation's boundary.
-      color: Theme.of(context).primaryColor.withOpacity(0.25),
+      color: Theme.of(context).primaryColor.withValues(alpha: 0.25),
       child: InkWell(
         onTap: onTap,
         child: Image.asset(
diff --git a/examples/_animation/basic_radial_hero_animation/pubspec.yaml b/examples/_animation/basic_radial_hero_animation/pubspec.yaml
index 6ceb5ab4961..ebe775d72d9 100644
--- a/examples/_animation/basic_radial_hero_animation/pubspec.yaml
+++ b/examples/_animation/basic_radial_hero_animation/pubspec.yaml
@@ -5,7 +5,7 @@ description: >-
   as it animates to the new route.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/_animation/basic_staggered_animation/lib/main.dart b/examples/_animation/basic_staggered_animation/lib/main.dart
index ae26b1970e9..34201ec90a6 100644
--- a/examples/_animation/basic_staggered_animation/lib/main.dart
+++ b/examples/_animation/basic_staggered_animation/lib/main.dart
@@ -187,9 +187,9 @@ class _StaggerDemoState extends State<StaggerDemo>
             width: 300,
             height: 300,
             decoration: BoxDecoration(
-              color: Colors.black.withOpacity(0.1),
+              color: Colors.black.withValues(alpha: 0.1),
               border: Border.all(
-                color: Colors.black.withOpacity(0.5),
+                color: Colors.black.withValues(alpha: 0.5),
               ),
             ),
             child: StaggerAnimation(controller: _controller.view),
diff --git a/examples/_animation/basic_staggered_animation/pubspec.yaml b/examples/_animation/basic_staggered_animation/pubspec.yaml
index a1b5317acf2..e8a0e0e7eef 100644
--- a/examples/_animation/basic_staggered_animation/pubspec.yaml
+++ b/examples/_animation/basic_staggered_animation/pubspec.yaml
@@ -3,7 +3,7 @@ publish_to: none
 description: An introductory example to staggered animations.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/_animation/hero_animation/pubspec.yaml b/examples/_animation/hero_animation/pubspec.yaml
index a257a6dffce..35cb549b1b3 100644
--- a/examples/_animation/hero_animation/pubspec.yaml
+++ b/examples/_animation/hero_animation/pubspec.yaml
@@ -3,7 +3,7 @@ publish_to: none
 description: Shows how to create a simple Hero transition.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/_animation/radial_hero_animation/lib/main.dart b/examples/_animation/radial_hero_animation/lib/main.dart
index d4d9f0f6a82..0519c81f480 100644
--- a/examples/_animation/radial_hero_animation/lib/main.dart
+++ b/examples/_animation/radial_hero_animation/lib/main.dart
@@ -25,7 +25,7 @@ class Photo extends StatelessWidget {
   Widget build(BuildContext context) {
     return Material(
       // Slightly opaque color appears where the image has transparency.
-      color: Theme.of(context).primaryColor.withOpacity(0.25),
+      color: Theme.of(context).primaryColor.withValues(alpha: 0.25),
       child: InkWell(
         onTap: onTap,
         child: LayoutBuilder(
diff --git a/examples/_animation/radial_hero_animation/pubspec.yaml b/examples/_animation/radial_hero_animation/pubspec.yaml
index e44e5f97e29..da3aa8726f3 100644
--- a/examples/_animation/radial_hero_animation/pubspec.yaml
+++ b/examples/_animation/radial_hero_animation/pubspec.yaml
@@ -5,7 +5,7 @@ description: >-
   as it animates to the new route.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/_animation/radial_hero_animation_animate_rectclip/lib/main.dart b/examples/_animation/radial_hero_animation_animate_rectclip/lib/main.dart
index ba5d6d9330e..e99b5bdc434 100644
--- a/examples/_animation/radial_hero_animation_animate_rectclip/lib/main.dart
+++ b/examples/_animation/radial_hero_animation_animate_rectclip/lib/main.dart
@@ -26,7 +26,7 @@ class Photo extends StatelessWidget {
   Widget build(BuildContext context) {
     return Material(
       // Slightly opaque color appears where the image has transparency.
-      color: Theme.of(context).primaryColor.withOpacity(0.25),
+      color: Theme.of(context).primaryColor.withValues(alpha: 0.25),
       child: InkWell(
         onTap: onTap,
         child: LayoutBuilder(
diff --git a/examples/_animation/radial_hero_animation_animate_rectclip/pubspec.yaml b/examples/_animation/radial_hero_animation_animate_rectclip/pubspec.yaml
index 5d164172d1f..59b4ba24c34 100644
--- a/examples/_animation/radial_hero_animation_animate_rectclip/pubspec.yaml
+++ b/examples/_animation/radial_hero_animation_animate_rectclip/pubspec.yaml
@@ -5,7 +5,7 @@ description: >-
   as it animates to the new route.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/_animation/staggered_pic_selection/pubspec.yaml b/examples/_animation/staggered_pic_selection/pubspec.yaml
index 9646105a922..0666c05313c 100644
--- a/examples/_animation/staggered_pic_selection/pubspec.yaml
+++ b/examples/_animation/staggered_pic_selection/pubspec.yaml
@@ -3,7 +3,7 @@ publish_to: none
 description: A more complex staggered animation example.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/accessibility/pubspec.yaml b/examples/accessibility/pubspec.yaml
index 14d7e77a2c3..bc3357cb670 100644
--- a/examples/accessibility/pubspec.yaml
+++ b/examples/accessibility/pubspec.yaml
@@ -4,7 +4,7 @@ version: 1.0.0
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/animation/animate0/pubspec.yaml b/examples/animation/animate0/pubspec.yaml
index c8b6bd8f552..35fb57d425e 100644
--- a/examples/animation/animate0/pubspec.yaml
+++ b/examples/animation/animate0/pubspec.yaml
@@ -5,7 +5,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/animation/animate1/pubspec.yaml b/examples/animation/animate1/pubspec.yaml
index c8b6bd8f552..35fb57d425e 100644
--- a/examples/animation/animate1/pubspec.yaml
+++ b/examples/animation/animate1/pubspec.yaml
@@ -5,7 +5,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/animation/animate2/pubspec.yaml b/examples/animation/animate2/pubspec.yaml
index c8b6bd8f552..35fb57d425e 100644
--- a/examples/animation/animate2/pubspec.yaml
+++ b/examples/animation/animate2/pubspec.yaml
@@ -5,7 +5,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/animation/animate3/pubspec.yaml b/examples/animation/animate3/pubspec.yaml
index c8b6bd8f552..35fb57d425e 100644
--- a/examples/animation/animate3/pubspec.yaml
+++ b/examples/animation/animate3/pubspec.yaml
@@ -5,7 +5,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/animation/animate4/pubspec.yaml b/examples/animation/animate4/pubspec.yaml
index c8b6bd8f552..35fb57d425e 100644
--- a/examples/animation/animate4/pubspec.yaml
+++ b/examples/animation/animate4/pubspec.yaml
@@ -5,7 +5,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/animation/animate5/pubspec.yaml b/examples/animation/animate5/pubspec.yaml
index c8b6bd8f552..35fb57d425e 100644
--- a/examples/animation/animate5/pubspec.yaml
+++ b/examples/animation/animate5/pubspec.yaml
@@ -5,7 +5,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/animation/implicit/pubspec.yaml b/examples/animation/implicit/pubspec.yaml
index 5dee182c413..9b428991242 100644
--- a/examples/animation/implicit/pubspec.yaml
+++ b/examples/animation/implicit/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/animation/animated_container/pubspec.yaml b/examples/cookbook/animation/animated_container/pubspec.yaml
index b15113738e0..8b249a029b3 100644
--- a/examples/cookbook/animation/animated_container/pubspec.yaml
+++ b/examples/cookbook/animation/animated_container/pubspec.yaml
@@ -2,7 +2,7 @@ name: animated_container
 description: Sample code for cookbook.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/animation/opacity_animation/pubspec.yaml b/examples/cookbook/animation/opacity_animation/pubspec.yaml
index 75c8e94b886..a8e995a2a5e 100644
--- a/examples/cookbook/animation/opacity_animation/pubspec.yaml
+++ b/examples/cookbook/animation/opacity_animation/pubspec.yaml
@@ -2,7 +2,7 @@ name: opacity_animation
 description: Sample code for cookbook.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/animation/page_route_animation/pubspec.yaml b/examples/cookbook/animation/page_route_animation/pubspec.yaml
index 8240138505e..b18e02876ec 100644
--- a/examples/cookbook/animation/page_route_animation/pubspec.yaml
+++ b/examples/cookbook/animation/page_route_animation/pubspec.yaml
@@ -2,7 +2,7 @@ name: page_route_animation
 description: Sample code for cookbook.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/animation/physics_simulation/pubspec.yaml b/examples/cookbook/animation/physics_simulation/pubspec.yaml
index 580eed7757f..0a07dc97d46 100644
--- a/examples/cookbook/animation/physics_simulation/pubspec.yaml
+++ b/examples/cookbook/animation/physics_simulation/pubspec.yaml
@@ -2,7 +2,7 @@ name: physics_simulation
 description: Sample code for cookbook.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/design/drawer/pubspec.yaml b/examples/cookbook/design/drawer/pubspec.yaml
index e5f0db5b71f..0ef57685bf6 100644
--- a/examples/cookbook/design/drawer/pubspec.yaml
+++ b/examples/cookbook/design/drawer/pubspec.yaml
@@ -2,7 +2,7 @@ name: drawer
 description: Sample code for drawer cookbook recipe.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/design/fonts/pubspec.yaml b/examples/cookbook/design/fonts/pubspec.yaml
index 3eb000a73fe..69efc92ad3b 100644
--- a/examples/cookbook/design/fonts/pubspec.yaml
+++ b/examples/cookbook/design/fonts/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/design/orientation/pubspec.yaml b/examples/cookbook/design/orientation/pubspec.yaml
index 06ef6d29e2f..8622631f1b3 100644
--- a/examples/cookbook/design/orientation/pubspec.yaml
+++ b/examples/cookbook/design/orientation/pubspec.yaml
@@ -2,7 +2,7 @@ name: orientation
 description: Sample code for orientation cookbook recipe.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/design/package_fonts/pubspec.yaml b/examples/cookbook/design/package_fonts/pubspec.yaml
index 9c0f6f632c1..2220917bfab 100644
--- a/examples/cookbook/design/package_fonts/pubspec.yaml
+++ b/examples/cookbook/design/package_fonts/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/design/snackbars/pubspec.yaml b/examples/cookbook/design/snackbars/pubspec.yaml
index c07b82053d9..077ff1cd12b 100644
--- a/examples/cookbook/design/snackbars/pubspec.yaml
+++ b/examples/cookbook/design/snackbars/pubspec.yaml
@@ -2,7 +2,7 @@ name: snackbars
 description: Sample code for snackbars cookbook recipe.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/design/tabs/pubspec.yaml b/examples/cookbook/design/tabs/pubspec.yaml
index 51ae998e854..f6168e55d2f 100644
--- a/examples/cookbook/design/tabs/pubspec.yaml
+++ b/examples/cookbook/design/tabs/pubspec.yaml
@@ -2,7 +2,7 @@ name: tabs
 description: Sample code for tabs cookbook recipe.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/design/themes/pubspec.yaml b/examples/cookbook/design/themes/pubspec.yaml
index 76b5595e24c..107eab04dfe 100644
--- a/examples/cookbook/design/themes/pubspec.yaml
+++ b/examples/cookbook/design/themes/pubspec.yaml
@@ -2,7 +2,7 @@ name: themes
 description: Sample code for themes cookbook recipe.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/effects/download_button/lib/button_taps.dart b/examples/cookbook/effects/download_button/lib/button_taps.dart
index 3a655c1e3e0..b9b772befcf 100644
--- a/examples/cookbook/effects/download_button/lib/button_taps.dart
+++ b/examples/cookbook/effects/download_button/lib/button_taps.dart
@@ -20,15 +20,16 @@ class ButtonShapeWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    var shape = const ShapeDecoration(
-      shape: StadiumBorder(),
-      color: CupertinoColors.lightBackgroundGray,
-    );
-
+    final ShapeDecoration shape;
     if (isDownloading || isFetching) {
-      shape = ShapeDecoration(
-        shape: const CircleBorder(),
-        color: Colors.white.withOpacity(0),
+      shape = const ShapeDecoration(
+        shape: CircleBorder(),
+        color: Colors.transparent,
+      );
+    } else {
+      shape = const ShapeDecoration(
+        shape: StadiumBorder(),
+        color: CupertinoColors.lightBackgroundGray,
       );
     }
 
@@ -81,7 +82,7 @@ class ProgressIndicatorWidget extends StatelessWidget {
           return CircularProgressIndicator(
             backgroundColor: isDownloading
                 ? CupertinoColors.lightBackgroundGray
-                : Colors.white.withOpacity(0),
+                : Colors.transparent,
             valueColor: AlwaysStoppedAnimation(isFetching
                 ? CupertinoColors.lightBackgroundGray
                 : CupertinoColors.activeBlue),
diff --git a/examples/cookbook/effects/download_button/lib/display.dart b/examples/cookbook/effects/download_button/lib/display.dart
index ac03085d1e8..0d83733e40d 100644
--- a/examples/cookbook/effects/download_button/lib/display.dart
+++ b/examples/cookbook/effects/download_button/lib/display.dart
@@ -56,15 +56,16 @@ class ButtonShapeWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    var shape = const ShapeDecoration(
-      shape: StadiumBorder(),
-      color: CupertinoColors.lightBackgroundGray,
-    );
-
+    final ShapeDecoration shape;
     if (isDownloading || isFetching) {
-      shape = ShapeDecoration(
-        shape: const CircleBorder(),
-        color: Colors.white.withOpacity(0),
+      shape = const ShapeDecoration(
+        shape: CircleBorder(),
+        color: Colors.transparent,
+      );
+    } else {
+      shape = const ShapeDecoration(
+        shape: StadiumBorder(),
+        color: CupertinoColors.lightBackgroundGray,
       );
     }
 
diff --git a/examples/cookbook/effects/download_button/lib/display_text.dart b/examples/cookbook/effects/download_button/lib/display_text.dart
index 340785fe485..66acb59e723 100644
--- a/examples/cookbook/effects/download_button/lib/display_text.dart
+++ b/examples/cookbook/effects/download_button/lib/display_text.dart
@@ -19,15 +19,16 @@ class ButtonShapeWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    var shape = const ShapeDecoration(
-      shape: StadiumBorder(),
-      color: CupertinoColors.lightBackgroundGray,
-    );
-
+    final ShapeDecoration shape;
     if (isDownloading || isFetching) {
-      shape = ShapeDecoration(
-        shape: const CircleBorder(),
-        color: Colors.white.withOpacity(0),
+      shape = const ShapeDecoration(
+        shape: CircleBorder(),
+        color: Colors.transparent,
+      );
+    } else {
+      shape = const ShapeDecoration(
+        shape: StadiumBorder(),
+        color: CupertinoColors.lightBackgroundGray,
       );
     }
 
diff --git a/examples/cookbook/effects/download_button/lib/main.dart b/examples/cookbook/effects/download_button/lib/main.dart
index 8a90903c33b..070e2663a76 100644
--- a/examples/cookbook/effects/download_button/lib/main.dart
+++ b/examples/cookbook/effects/download_button/lib/main.dart
@@ -328,15 +328,16 @@ class ButtonShapeWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    var shape = const ShapeDecoration(
-      shape: StadiumBorder(),
-      color: CupertinoColors.lightBackgroundGray,
-    );
-
+    final ShapeDecoration shape;
     if (isDownloading || isFetching) {
-      shape = ShapeDecoration(
-        shape: const CircleBorder(),
-        color: Colors.white.withOpacity(0),
+      shape = const ShapeDecoration(
+        shape: CircleBorder(),
+        color: Colors.transparent,
+      );
+    } else {
+      shape = const ShapeDecoration(
+        shape: StadiumBorder(),
+        color: CupertinoColors.lightBackgroundGray,
       );
     }
 
@@ -389,7 +390,7 @@ class ProgressIndicatorWidget extends StatelessWidget {
           return CircularProgressIndicator(
             backgroundColor: isDownloading
                 ? CupertinoColors.lightBackgroundGray
-                : Colors.white.withOpacity(0),
+                : Colors.transparent,
             valueColor: AlwaysStoppedAnimation(isFetching
                 ? CupertinoColors.lightBackgroundGray
                 : CupertinoColors.activeBlue),
diff --git a/examples/cookbook/effects/download_button/lib/spinner.dart b/examples/cookbook/effects/download_button/lib/spinner.dart
index 3d58d596fbd..85db5e4d898 100644
--- a/examples/cookbook/effects/download_button/lib/spinner.dart
+++ b/examples/cookbook/effects/download_button/lib/spinner.dart
@@ -18,15 +18,16 @@ class ButtonShapeWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    var shape = const ShapeDecoration(
-      shape: StadiumBorder(),
-      color: CupertinoColors.lightBackgroundGray,
-    );
-
+    final ShapeDecoration shape;
     if (isDownloading || isFetching) {
-      shape = ShapeDecoration(
-        shape: const CircleBorder(),
-        color: Colors.white.withOpacity(0),
+      shape = const ShapeDecoration(
+        shape: CircleBorder(),
+        color: Colors.transparent,
+      );
+    } else {
+      shape = const ShapeDecoration(
+        shape: StadiumBorder(),
+        color: CupertinoColors.lightBackgroundGray,
       );
     }
 
@@ -79,7 +80,7 @@ class ProgressIndicatorWidget extends StatelessWidget {
           return CircularProgressIndicator(
             backgroundColor: isDownloading
                 ? CupertinoColors.lightBackgroundGray
-                : Colors.white.withOpacity(0),
+                : Colors.transparent,
             valueColor: AlwaysStoppedAnimation(isFetching
                 ? CupertinoColors.lightBackgroundGray
                 : CupertinoColors.activeBlue),
diff --git a/examples/cookbook/effects/download_button/lib/stop.dart b/examples/cookbook/effects/download_button/lib/stop.dart
index 58c945e6ad6..b341172264c 100644
--- a/examples/cookbook/effects/download_button/lib/stop.dart
+++ b/examples/cookbook/effects/download_button/lib/stop.dart
@@ -18,15 +18,16 @@ class ButtonShapeWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    var shape = const ShapeDecoration(
-      shape: StadiumBorder(),
-      color: CupertinoColors.lightBackgroundGray,
-    );
-
+    final ShapeDecoration shape;
     if (isDownloading || isFetching) {
-      shape = ShapeDecoration(
-        shape: const CircleBorder(),
-        color: Colors.white.withOpacity(0),
+      shape = const ShapeDecoration(
+        shape: CircleBorder(),
+        color: Colors.transparent,
+      );
+    } else {
+      shape = const ShapeDecoration(
+        shape: StadiumBorder(),
+        color: CupertinoColors.lightBackgroundGray,
       );
     }
 
@@ -79,7 +80,7 @@ class ProgressIndicatorWidget extends StatelessWidget {
           return CircularProgressIndicator(
             backgroundColor: isDownloading
                 ? CupertinoColors.lightBackgroundGray
-                : Colors.white.withOpacity(0),
+                : Colors.transparent,
             valueColor: AlwaysStoppedAnimation(isFetching
                 ? CupertinoColors.lightBackgroundGray
                 : CupertinoColors.activeBlue),
diff --git a/examples/cookbook/effects/download_button/pubspec.yaml b/examples/cookbook/effects/download_button/pubspec.yaml
index 49661891e18..4db49573d9f 100644
--- a/examples/cookbook/effects/download_button/pubspec.yaml
+++ b/examples/cookbook/effects/download_button/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/effects/drag_a_widget/pubspec.yaml b/examples/cookbook/effects/drag_a_widget/pubspec.yaml
index bbe23e6277e..34a5147025f 100644
--- a/examples/cookbook/effects/drag_a_widget/pubspec.yaml
+++ b/examples/cookbook/effects/drag_a_widget/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/effects/expandable_fab/pubspec.yaml b/examples/cookbook/effects/expandable_fab/pubspec.yaml
index a8a8cc252a5..c659f6b9180 100644
--- a/examples/cookbook/effects/expandable_fab/pubspec.yaml
+++ b/examples/cookbook/effects/expandable_fab/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/effects/gradient_bubbles/pubspec.yaml b/examples/cookbook/effects/gradient_bubbles/pubspec.yaml
index 53bfe2fdc2a..127dd349009 100644
--- a/examples/cookbook/effects/gradient_bubbles/pubspec.yaml
+++ b/examples/cookbook/effects/gradient_bubbles/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/effects/nested_nav/pubspec.yaml b/examples/cookbook/effects/nested_nav/pubspec.yaml
index 0a6a3152de6..1d7cd4e8d5b 100644
--- a/examples/cookbook/effects/nested_nav/pubspec.yaml
+++ b/examples/cookbook/effects/nested_nav/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/effects/parallax_scrolling/lib/excerpt2.dart b/examples/cookbook/effects/parallax_scrolling/lib/excerpt2.dart
index b9d88d95cb8..d53499b4ad8 100644
--- a/examples/cookbook/effects/parallax_scrolling/lib/excerpt2.dart
+++ b/examples/cookbook/effects/parallax_scrolling/lib/excerpt2.dart
@@ -48,7 +48,7 @@ class LocationListItem extends StatelessWidget {
       child: DecoratedBox(
         decoration: BoxDecoration(
           gradient: LinearGradient(
-            colors: [Colors.transparent, Colors.black.withOpacity(0.7)],
+            colors: [Colors.transparent, Colors.black.withValues(alpha: 0.7)],
             begin: Alignment.topCenter,
             end: Alignment.bottomCenter,
             stops: const [0.6, 0.95],
diff --git a/examples/cookbook/effects/parallax_scrolling/lib/excerpt3.dart b/examples/cookbook/effects/parallax_scrolling/lib/excerpt3.dart
index 2ef0f40bebd..d803fb1e807 100644
--- a/examples/cookbook/effects/parallax_scrolling/lib/excerpt3.dart
+++ b/examples/cookbook/effects/parallax_scrolling/lib/excerpt3.dart
@@ -45,7 +45,7 @@ class LocationListItem extends StatelessWidget {
       child: DecoratedBox(
         decoration: BoxDecoration(
           gradient: LinearGradient(
-            colors: [Colors.transparent, Colors.black.withOpacity(0.7)],
+            colors: [Colors.transparent, Colors.black.withValues(alpha: 0.7)],
             begin: Alignment.topCenter,
             end: Alignment.bottomCenter,
             stops: const [0.6, 0.95],
diff --git a/examples/cookbook/effects/parallax_scrolling/lib/excerpt4.dart b/examples/cookbook/effects/parallax_scrolling/lib/excerpt4.dart
index b65ad62ddf0..b48891d54f4 100644
--- a/examples/cookbook/effects/parallax_scrolling/lib/excerpt4.dart
+++ b/examples/cookbook/effects/parallax_scrolling/lib/excerpt4.dart
@@ -52,7 +52,7 @@ class LocationListItem extends StatelessWidget {
       child: DecoratedBox(
         decoration: BoxDecoration(
           gradient: LinearGradient(
-            colors: [Colors.transparent, Colors.black.withOpacity(0.7)],
+            colors: [Colors.transparent, Colors.black.withValues(alpha: 0.7)],
             begin: Alignment.topCenter,
             end: Alignment.bottomCenter,
             stops: const [0.6, 0.95],
diff --git a/examples/cookbook/effects/parallax_scrolling/lib/excerpt5.dart b/examples/cookbook/effects/parallax_scrolling/lib/excerpt5.dart
index b49d3308da1..6053b87747b 100644
--- a/examples/cookbook/effects/parallax_scrolling/lib/excerpt5.dart
+++ b/examples/cookbook/effects/parallax_scrolling/lib/excerpt5.dart
@@ -59,7 +59,7 @@ class LocationListItem extends StatelessWidget {
       child: DecoratedBox(
         decoration: BoxDecoration(
           gradient: LinearGradient(
-            colors: [Colors.transparent, Colors.black.withOpacity(0.7)],
+            colors: [Colors.transparent, Colors.black.withValues(alpha: 0.7)],
             begin: Alignment.topCenter,
             end: Alignment.bottomCenter,
             stops: const [0.6, 0.95],
diff --git a/examples/cookbook/effects/parallax_scrolling/lib/main.dart b/examples/cookbook/effects/parallax_scrolling/lib/main.dart
index c20cd4aa1bb..c9018b3bf89 100644
--- a/examples/cookbook/effects/parallax_scrolling/lib/main.dart
+++ b/examples/cookbook/effects/parallax_scrolling/lib/main.dart
@@ -101,7 +101,7 @@ class LocationListItem extends StatelessWidget {
       child: DecoratedBox(
         decoration: BoxDecoration(
           gradient: LinearGradient(
-            colors: [Colors.transparent, Colors.black.withOpacity(0.7)],
+            colors: [Colors.transparent, Colors.black.withValues(alpha: 0.7)],
             begin: Alignment.topCenter,
             end: Alignment.bottomCenter,
             stops: const [0.6, 0.95],
diff --git a/examples/cookbook/effects/parallax_scrolling/pubspec.yaml b/examples/cookbook/effects/parallax_scrolling/pubspec.yaml
index f40f5b1f09d..44ac007835e 100644
--- a/examples/cookbook/effects/parallax_scrolling/pubspec.yaml
+++ b/examples/cookbook/effects/parallax_scrolling/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/effects/photo_filter_carousel/analysis_options.yaml b/examples/cookbook/effects/photo_filter_carousel/analysis_options.yaml
deleted file mode 100644
index eee60e0f5a2..00000000000
--- a/examples/cookbook/effects/photo_filter_carousel/analysis_options.yaml
+++ /dev/null
@@ -1,5 +0,0 @@
-# Take our settings from the example_utils analysis_options.yaml file.
-# If necessary for a particular example, this file can also include
-# overrides for individual lints.
-
-include: package:example_utils/analysis.yaml
diff --git a/examples/cookbook/effects/photo_filter_carousel/lib/excerpt1.dart b/examples/cookbook/effects/photo_filter_carousel/lib/excerpt1.dart
deleted file mode 100644
index f0127eb5a60..00000000000
--- a/examples/cookbook/effects/photo_filter_carousel/lib/excerpt1.dart
+++ /dev/null
@@ -1,71 +0,0 @@
-import 'package:flutter/material.dart';
-
-// #docregion FilterSelector
-@immutable
-class FilterSelector extends StatefulWidget {
-  const FilterSelector({
-    super.key,
-  });
-
-  @override
-  State<FilterSelector> createState() => _FilterSelectorState();
-}
-
-class _FilterSelectorState extends State<FilterSelector> {
-  @override
-  Widget build(BuildContext context) {
-    return const SizedBox();
-  }
-}
-// #enddocregion FilterSelector
-
-@immutable
-class ExampleInstagramFilterSelection extends StatefulWidget {
-  const ExampleInstagramFilterSelection({super.key});
-
-  @override
-  State<ExampleInstagramFilterSelection> createState() =>
-      _ExampleInstagramFilterSelectionState();
-}
-
-class _ExampleInstagramFilterSelectionState
-    extends State<ExampleInstagramFilterSelection> {
-  final _filterColor = ValueNotifier<Color>(Colors.white);
-
-  @override
-  Widget build(BuildContext context) {
-    return Material(
-      color: Colors.black,
-      // #docregion Stack
-      child: Stack(
-        children: [
-          Positioned.fill(
-            child: _buildPhotoWithFilter(),
-          ),
-          const Positioned(
-            left: 0.0,
-            right: 0.0,
-            bottom: 0.0,
-            child: FilterSelector(),
-          ),
-        ],
-      ),
-      // #enddocregion Stack
-    );
-  }
-
-  Widget _buildPhotoWithFilter() {
-    return ValueListenableBuilder(
-      valueListenable: _filterColor,
-      builder: (context, color, child) {
-        return Image.network(
-          'https://docs.flutter.dev/cookbook/img-files'
-          '/effects/instagram-buttons/millennial-dude.jpg',
-          color: color.withOpacity(0.5),
-          colorBlendMode: BlendMode.color,
-          fit: BoxFit.cover,
-        );
-      },
-    );
-  }
-}
diff --git a/examples/cookbook/effects/photo_filter_carousel/lib/excerpt2.dart b/examples/cookbook/effects/photo_filter_carousel/lib/excerpt2.dart
deleted file mode 100644
index de8976159da..00000000000
--- a/examples/cookbook/effects/photo_filter_carousel/lib/excerpt2.dart
+++ /dev/null
@@ -1,81 +0,0 @@
-import 'package:flutter/material.dart';
-
-@immutable
-class FilterSelector extends StatefulWidget {
-  const FilterSelector({
-    super.key,
-    required this.filters,
-    required this.onFilterChanged,
-    this.padding = const EdgeInsets.symmetric(vertical: 24),
-  });
-
-  final List<Color> filters;
-  final void Function(Color selectedColor) onFilterChanged;
-  final EdgeInsets padding;
-
-  @override
-  State<FilterSelector> createState() => _FilterSelectorState();
-}
-
-// #docregion FilterSelectorState2
-class _FilterSelectorState extends State<FilterSelector> {
-  static const _filtersPerScreen = 5;
-  static const _viewportFractionPerItem = 1.0 / _filtersPerScreen;
-
-  @override
-  Widget build(BuildContext context) {
-    return LayoutBuilder(
-      builder: (context, constraints) {
-        final itemSize = constraints.maxWidth * _viewportFractionPerItem;
-
-        return Stack(
-          alignment: Alignment.bottomCenter,
-          children: [
-            _buildShadowGradient(itemSize),
-            _buildSelectionRing(itemSize),
-          ],
-        );
-      },
-    );
-  }
-
-  Widget _buildShadowGradient(double itemSize) {
-    return SizedBox(
-      height: itemSize * 2 + widget.padding.vertical,
-      child: const DecoratedBox(
-        decoration: BoxDecoration(
-          gradient: LinearGradient(
-            begin: Alignment.topCenter,
-            end: Alignment.bottomCenter,
-            colors: [
-              Colors.transparent,
-              Colors.black,
-            ],
-          ),
-        ),
-        child: SizedBox.expand(),
-      ),
-    );
-  }
-
-  Widget _buildSelectionRing(double itemSize) {
-    return IgnorePointer(
-      child: Padding(
-        padding: widget.padding,
-        child: SizedBox(
-          width: itemSize,
-          height: itemSize,
-          child: const DecoratedBox(
-            decoration: BoxDecoration(
-              shape: BoxShape.circle,
-              border: Border.fromBorderSide(
-                BorderSide(width: 6, color: Colors.white),
-              ),
-            ),
-          ),
-        ),
-      ),
-    );
-  }
-}
-// #enddocregion FilterSelectorState2
diff --git a/examples/cookbook/effects/photo_filter_carousel/lib/excerpt3.dart b/examples/cookbook/effects/photo_filter_carousel/lib/excerpt3.dart
deleted file mode 100644
index 4cd56d03dd2..00000000000
--- a/examples/cookbook/effects/photo_filter_carousel/lib/excerpt3.dart
+++ /dev/null
@@ -1,95 +0,0 @@
-import 'package:flutter/material.dart';
-
-@immutable
-class FilterSelector extends StatefulWidget {
-  const FilterSelector({
-    super.key,
-    required this.filters,
-    required this.onFilterChanged,
-    this.padding = const EdgeInsets.symmetric(vertical: 24),
-  });
-
-  final List<Color> filters;
-  final void Function(Color selectedColor) onFilterChanged;
-  final EdgeInsets padding;
-
-  @override
-  State<FilterSelector> createState() => _FilterSelectorState();
-}
-
-class _FilterSelectorState extends State<FilterSelector> {
-  static const _filtersPerScreen = 5;
-  static const _viewportFractionPerItem = 1.0 / _filtersPerScreen;
-
-  Color itemColor(int index) => widget.filters[index % widget.filters.length];
-
-  Widget _buildShadowGradient(double itemSize) {
-    return SizedBox(
-      height: itemSize * 2 + widget.padding.vertical,
-      child: const DecoratedBox(
-        decoration: BoxDecoration(
-          gradient: LinearGradient(
-            begin: Alignment.topCenter,
-            end: Alignment.bottomCenter,
-            colors: [
-              Colors.transparent,
-              Colors.black,
-            ],
-          ),
-        ),
-        child: SizedBox.expand(),
-      ),
-    );
-  }
-
-  Widget _buildSelectionRing(double itemSize) {
-    return IgnorePointer(
-      child: Padding(
-        padding: widget.padding,
-        child: SizedBox(
-          width: itemSize,
-          height: itemSize,
-          child: const DecoratedBox(
-            decoration: BoxDecoration(
-              shape: BoxShape.circle,
-              border: Border.fromBorderSide(
-                BorderSide(width: 6, color: Colors.white),
-              ),
-            ),
-          ),
-        ),
-      ),
-    );
-  }
-
-  // #docregion page-view
-  @override
-  Widget build(BuildContext context) {
-    return LayoutBuilder(builder: (context, constraints) {
-      final itemSize = constraints.maxWidth * _viewportFractionPerItem;
-
-      return Stack(
-        alignment: Alignment.bottomCenter,
-        children: [
-          _buildShadowGradient(itemSize),
-          _buildCarousel(itemSize),
-          _buildSelectionRing(itemSize),
-        ],
-      );
-    });
-  }
-
-  Widget _buildCarousel(double itemSize) {
-    return Container(
-      height: itemSize,
-      margin: widget.padding,
-      child: PageView.builder(
-        itemCount: widget.filters.length,
-        itemBuilder: (context, index) {
-          return const SizedBox();
-        },
-      ),
-    );
-  }
-  // #enddocregion page-view
-}
diff --git a/examples/cookbook/effects/photo_filter_carousel/lib/excerpt4.dart b/examples/cookbook/effects/photo_filter_carousel/lib/excerpt4.dart
deleted file mode 100644
index 99523cb880d..00000000000
--- a/examples/cookbook/effects/photo_filter_carousel/lib/excerpt4.dart
+++ /dev/null
@@ -1,133 +0,0 @@
-import 'package:flutter/material.dart';
-
-@immutable
-class FilterSelector extends StatefulWidget {
-  const FilterSelector({
-    super.key,
-    required this.filters,
-    required this.onFilterChanged,
-    this.padding = const EdgeInsets.symmetric(vertical: 24),
-  });
-
-  final List<Color> filters;
-  final void Function(Color selectedColor) onFilterChanged;
-  final EdgeInsets padding;
-
-  @override
-  State<FilterSelector> createState() => _FilterSelectorState();
-}
-
-class _FilterSelectorState extends State<FilterSelector> {
-  static const _filtersPerScreen = 5;
-  static const _viewportFractionPerItem = 1.0 / _filtersPerScreen;
-
-  // #docregion BuildFilterItem
-  Color itemColor(int index) => widget.filters[index % widget.filters.length];
-
-  Widget _buildCarousel(double itemSize) {
-    return Container(
-      height: itemSize,
-      margin: widget.padding,
-      child: PageView.builder(
-        itemCount: widget.filters.length,
-        itemBuilder: (context, index) {
-          return Center(
-            child: FilterItem(
-              color: itemColor(index),
-              onFilterSelected: () {},
-            ),
-          );
-        },
-      ),
-    );
-  }
-  // #enddocregion BuildFilterItem
-
-  Widget _buildShadowGradient(double itemSize) {
-    return SizedBox(
-      height: itemSize * 2 + widget.padding.vertical,
-      child: const DecoratedBox(
-        decoration: BoxDecoration(
-          gradient: LinearGradient(
-            begin: Alignment.topCenter,
-            end: Alignment.bottomCenter,
-            colors: [
-              Colors.transparent,
-              Colors.black,
-            ],
-          ),
-        ),
-        child: SizedBox.expand(),
-      ),
-    );
-  }
-
-  Widget _buildSelectionRing(double itemSize) {
-    return IgnorePointer(
-      child: Padding(
-        padding: widget.padding,
-        child: SizedBox(
-          width: itemSize,
-          height: itemSize,
-          child: const DecoratedBox(
-            decoration: BoxDecoration(
-              shape: BoxShape.circle,
-              border: Border.fromBorderSide(
-                BorderSide(width: 6, color: Colors.white),
-              ),
-            ),
-          ),
-        ),
-      ),
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return LayoutBuilder(builder: (context, constraints) {
-      final itemSize = constraints.maxWidth * _viewportFractionPerItem;
-
-      return Stack(
-        alignment: Alignment.bottomCenter,
-        children: [
-          _buildShadowGradient(itemSize),
-          _buildCarousel(itemSize),
-          _buildSelectionRing(itemSize),
-        ],
-      );
-    });
-  }
-}
-
-@immutable
-class FilterItem extends StatelessWidget {
-  const FilterItem({
-    super.key,
-    required this.color,
-    this.onFilterSelected,
-  });
-
-  final Color color;
-  final VoidCallback? onFilterSelected;
-
-  @override
-  Widget build(BuildContext context) {
-    return GestureDetector(
-      onTap: onFilterSelected,
-      child: AspectRatio(
-        aspectRatio: 1.0,
-        child: Padding(
-          padding: const EdgeInsets.all(8),
-          child: ClipOval(
-            child: Image.network(
-              'https://docs.flutter.dev/cookbook/img-files'
-              '/effects/instagram-buttons/millennial-texture.jpg',
-              color: color.withOpacity(0.5),
-              colorBlendMode: BlendMode.hardLight,
-            ),
-          ),
-        ),
-      ),
-    );
-  }
-}
diff --git a/examples/cookbook/effects/photo_filter_carousel/lib/excerpt5.dart b/examples/cookbook/effects/photo_filter_carousel/lib/excerpt5.dart
deleted file mode 100644
index 8ac7ff78246..00000000000
--- a/examples/cookbook/effects/photo_filter_carousel/lib/excerpt5.dart
+++ /dev/null
@@ -1,109 +0,0 @@
-import 'package:flutter/material.dart';
-
-@immutable
-class FilterSelector extends StatefulWidget {
-  const FilterSelector({
-    super.key,
-    required this.filters,
-    required this.onFilterChanged,
-    this.padding = const EdgeInsets.symmetric(vertical: 24),
-  });
-
-  final List<Color> filters;
-  final void Function(Color selectedColor) onFilterChanged;
-  final EdgeInsets padding;
-
-  @override
-  State<FilterSelector> createState() => _FilterSelectorState();
-}
-
-// #docregion page-view-controller
-class _FilterSelectorState extends State<FilterSelector> {
-  static const _filtersPerScreen = 5;
-  static const _viewportFractionPerItem = 1.0 / _filtersPerScreen;
-
-  late final PageController _controller;
-
-  Color itemColor(int index) => widget.filters[index % widget.filters.length];
-
-  @override
-  void initState() {
-    super.initState();
-    _controller = PageController(
-      viewportFraction: _viewportFractionPerItem,
-    );
-    _controller.addListener(_onPageChanged);
-  }
-
-  void _onPageChanged() {
-    final page = (_controller.page ?? 0).round();
-    widget.onFilterChanged(widget.filters[page]);
-  }
-
-  @override
-  void dispose() {
-    _controller.dispose();
-    super.dispose();
-  }
-
-  Widget _buildCarousel(double itemSize) {
-    return Container(
-      height: itemSize,
-      margin: widget.padding,
-      child: PageView.builder(
-        controller: _controller,
-        itemCount: widget.filters.length,
-        itemBuilder: (context, index) {
-          return Center(
-            child: FilterItem(
-              color: itemColor(index),
-              onFilterSelected: () {},
-            ),
-          );
-        },
-      ),
-    );
-  }
-  // #enddocregion page-view-controller
-
-  @override
-  Widget build(BuildContext context) {
-    _buildCarousel(5); // Makes sure _buildCarousel is used
-    return Container();
-  }
-  // #docregion page-view-controller
-}
-// #enddocregion page-view-controller
-
-@immutable
-class FilterItem extends StatelessWidget {
-  const FilterItem({
-    super.key,
-    required this.color,
-    this.onFilterSelected,
-  });
-
-  final Color color;
-  final VoidCallback? onFilterSelected;
-
-  @override
-  Widget build(BuildContext context) {
-    return GestureDetector(
-      onTap: onFilterSelected,
-      child: AspectRatio(
-        aspectRatio: 1.0,
-        child: Padding(
-          padding: const EdgeInsets.all(8),
-          child: ClipOval(
-            child: Image.network(
-              'https://docs.flutter.dev/cookbook/img-files'
-              '/effects/instagram-buttons/millennial-texture.jpg',
-              color: color.withOpacity(0.5),
-              colorBlendMode: BlendMode.hardLight,
-            ),
-          ),
-        ),
-      ),
-    );
-  }
-}
diff --git a/examples/cookbook/effects/photo_filter_carousel/lib/excerpt6.dart b/examples/cookbook/effects/photo_filter_carousel/lib/excerpt6.dart
deleted file mode 100644
index 5571f9390a2..00000000000
--- a/examples/cookbook/effects/photo_filter_carousel/lib/excerpt6.dart
+++ /dev/null
@@ -1,112 +0,0 @@
-import 'package:flutter/material.dart';
-
-@immutable
-class FilterSelector extends StatefulWidget {
-  const FilterSelector({
-    super.key,
-    required this.filters,
-    required this.onFilterChanged,
-    this.padding = const EdgeInsets.symmetric(vertical: 24),
-  });
-
-  final List<Color> filters;
-  final void Function(Color selectedColor) onFilterChanged;
-  final EdgeInsets padding;
-
-  @override
-  State<FilterSelector> createState() => _FilterSelectorState();
-}
-
-class _FilterSelectorState extends State<FilterSelector> {
-  static const _filtersPerScreen = 5;
-  static const _viewportFractionPerItem = 1.0 / _filtersPerScreen;
-
-  late final PageController _controller;
-
-  Color itemColor(int index) => widget.filters[index % widget.filters.length];
-
-  @override
-  void initState() {
-    super.initState();
-    _controller = PageController(
-      viewportFraction: _viewportFractionPerItem,
-    );
-    _controller.addListener(_onPageChanged);
-  }
-
-  void _onPageChanged() {
-    final page = (_controller.page ?? 0).round();
-    widget.onFilterChanged(widget.filters[page]);
-  }
-
-  @override
-  void dispose() {
-    _controller.dispose();
-    super.dispose();
-  }
-
-  // #docregion BuildCarousel
-  Widget _buildCarousel(double itemSize) {
-    return Container(
-      height: itemSize,
-      margin: widget.padding,
-      child: PageView.builder(
-        controller: _controller,
-        itemCount: widget.filters.length,
-        itemBuilder: (context, index) {
-          return Center(
-            child: AnimatedBuilder(
-              animation: _controller,
-              builder: (context, child) {
-                return FilterItem(
-                  color: itemColor(index),
-                  onFilterSelected: () => {},
-                );
-              },
-            ),
-          );
-        },
-      ),
-    );
-  }
-  // #enddocregion BuildCarousel
-
-  @override
-  Widget build(BuildContext context) {
-    _buildCarousel(5); // Makes sure _buildCarousel is used
-    return Container();
-  }
-}
-
-@immutable
-class FilterItem extends StatelessWidget {
-  const FilterItem({
-    super.key,
-    required this.color,
-    this.onFilterSelected,
-  });
-
-  final Color color;
-  final VoidCallback? onFilterSelected;
-
-  @override
-  Widget build(BuildContext context) {
-    return GestureDetector(
-      onTap: onFilterSelected,
-      child: AspectRatio(
-        aspectRatio: 1.0,
-        child: Padding(
-          padding: const EdgeInsets.all(8),
-          child: ClipOval(
-            child: Image.network(
-              'https://docs.flutter.dev/cookbook/img-files'
-              '/effects/instagram-buttons/millennial-texture.jpg',
-              color: color.withOpacity(0.5),
-              colorBlendMode: BlendMode.hardLight,
-            ),
-          ),
-        ),
-      ),
-    );
-  }
-}
diff --git a/examples/cookbook/effects/photo_filter_carousel/lib/main.dart b/examples/cookbook/effects/photo_filter_carousel/lib/main.dart
deleted file mode 100644
index 3829d0d57ec..00000000000
--- a/examples/cookbook/effects/photo_filter_carousel/lib/main.dart
+++ /dev/null
@@ -1,332 +0,0 @@
-import 'dart:math' as math;
-
-import 'package:flutter/material.dart';
-import 'package:flutter/rendering.dart' show ViewportOffset;
-
-void main() {
-  runApp(
-    const MaterialApp(
-      home: ExampleInstagramFilterSelection(),
-      debugShowCheckedModeBanner: false,
-    ),
-  );
-}
-
-@immutable
-class ExampleInstagramFilterSelection extends StatefulWidget {
-  const ExampleInstagramFilterSelection({super.key});
-
-  @override
-  State<ExampleInstagramFilterSelection> createState() =>
-      _ExampleInstagramFilterSelectionState();
-}
-
-class _ExampleInstagramFilterSelectionState
-    extends State<ExampleInstagramFilterSelection> {
-  final _filters = [
-    Colors.white,
-    ...List.generate(
-      Colors.primaries.length,
-      (index) => Colors.primaries[(index * 4) % Colors.primaries.length],
-    )
-  ];
-
-  final _filterColor = ValueNotifier<Color>(Colors.white);
-
-  void _onFilterChanged(Color value) {
-    _filterColor.value = value;
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Material(
-      color: Colors.black,
-      child: Stack(
-        children: [
-          Positioned.fill(
-            child: _buildPhotoWithFilter(),
-          ),
-          Positioned(
-            left: 0.0,
-            right: 0.0,
-            bottom: 0.0,
-            child: _buildFilterSelector(),
-          ),
-        ],
-      ),
-    );
-  }
-
-  Widget _buildPhotoWithFilter() {
-    return ValueListenableBuilder(
-      valueListenable: _filterColor,
-      builder: (context, color, child) {
-        return Image.network(
-          'https://docs.flutter.dev/cookbook/img-files'
-          '/effects/instagram-buttons/millennial-dude.jpg',
-          color: color.withOpacity(0.5),
-          colorBlendMode: BlendMode.color,
-          fit: BoxFit.cover,
-        );
-      },
-    );
-  }
-
-  Widget _buildFilterSelector() {
-    return FilterSelector(
-      onFilterChanged: _onFilterChanged,
-      filters: _filters,
-    );
-  }
-}
-
-@immutable
-class FilterSelector extends StatefulWidget {
-  const FilterSelector({
-    super.key,
-    required this.filters,
-    required this.onFilterChanged,
-    this.padding = const EdgeInsets.symmetric(vertical: 24),
-  });
-
-  final List<Color> filters;
-  final void Function(Color selectedColor) onFilterChanged;
-  final EdgeInsets padding;
-
-  @override
-  State<FilterSelector> createState() => _FilterSelectorState();
-}
-
-class _FilterSelectorState extends State<FilterSelector> {
-  static const _filtersPerScreen = 5;
-  static const _viewportFractionPerItem = 1.0 / _filtersPerScreen;
-
-  late final PageController _controller;
-  late int _page;
-
-  int get filterCount => widget.filters.length;
-
-  Color itemColor(int index) => widget.filters[index % filterCount];
-
-  @override
-  void initState() {
-    super.initState();
-    _page = 0;
-    _controller = PageController(
-      initialPage: _page,
-      viewportFraction: _viewportFractionPerItem,
-    );
-    _controller.addListener(_onPageChanged);
-  }
-
-  void _onPageChanged() {
-    final page = (_controller.page ?? 0).round();
-    if (page != _page) {
-      _page = page;
-      widget.onFilterChanged(widget.filters[page]);
-    }
-  }
-
-  void _onFilterTapped(int index) {
-    _controller.animateToPage(
-      index,
-      duration: const Duration(milliseconds: 450),
-      curve: Curves.ease,
-    );
-  }
-
-  @override
-  void dispose() {
-    _controller.dispose();
-    super.dispose();
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Scrollable(
-      controller: _controller,
-      axisDirection: AxisDirection.right,
-      physics: const PageScrollPhysics(),
-      viewportBuilder: (context, viewportOffset) {
-        return LayoutBuilder(
-          builder: (context, constraints) {
-            final itemSize = constraints.maxWidth * _viewportFractionPerItem;
-            viewportOffset
-              ..applyViewportDimension(constraints.maxWidth)
-              ..applyContentDimensions(0.0, itemSize * (filterCount - 1));
-
-            return Stack(
-              alignment: Alignment.bottomCenter,
-              children: [
-                _buildShadowGradient(itemSize),
-                _buildCarousel(
-                  viewportOffset: viewportOffset,
-                  itemSize: itemSize,
-                ),
-                _buildSelectionRing(itemSize),
-              ],
-            );
-          },
-        );
-      },
-    );
-  }
-
-  Widget _buildShadowGradient(double itemSize) {
-    return SizedBox(
-      height: itemSize * 2 + widget.padding.vertical,
-      child: const DecoratedBox(
-        decoration: BoxDecoration(
-          gradient: LinearGradient(
-            begin: Alignment.topCenter,
-            end: Alignment.bottomCenter,
-            colors: [
-              Colors.transparent,
-              Colors.black,
-            ],
-          ),
-        ),
-        child: SizedBox.expand(),
-      ),
-    );
-  }
-
-  Widget _buildCarousel({
-    required ViewportOffset viewportOffset,
-    required double itemSize,
-  }) {
-    return Container(
-      height: itemSize,
-      margin: widget.padding,
-      child: Flow(
-        delegate: CarouselFlowDelegate(
-          viewportOffset: viewportOffset,
-          filtersPerScreen: _filtersPerScreen,
-        ),
-        children: [
-          for (int i = 0; i < filterCount; i++)
-            FilterItem(
-              onFilterSelected: () => _onFilterTapped(i),
-              color: itemColor(i),
-            ),
-        ],
-      ),
-    );
-  }
-
-  Widget _buildSelectionRing(double itemSize) {
-    return IgnorePointer(
-      child: Padding(
-        padding: widget.padding,
-        child: SizedBox(
-          width: itemSize,
-          height: itemSize,
-          child: const DecoratedBox(
-            decoration: BoxDecoration(
-              shape: BoxShape.circle,
-              border: Border.fromBorderSide(
-                BorderSide(width: 6, color: Colors.white),
-              ),
-            ),
-          ),
-        ),
-      ),
-    );
-  }
-}
-
-class CarouselFlowDelegate extends FlowDelegate {
-  CarouselFlowDelegate({
-    required this.viewportOffset,
-    required this.filtersPerScreen,
-  }) : super(repaint: viewportOffset);
-
-  final ViewportOffset viewportOffset;
-  final int filtersPerScreen;
-
-  @override
-  void paintChildren(FlowPaintingContext context) {
-    final count = context.childCount;
-
-    // All available painting width
-    final size = context.size.width;
-
-    // The distance that a single item "page" takes up from the perspective
-    // of the scroll paging system. We also use this size for the width and
-    // height of a single item.
-    final itemExtent = size / filtersPerScreen;
-
-    // The current scroll position expressed as an item fraction, e.g., 0.0,
-    // or 1.0, or 1.3, or 2.9, etc. A value of 1.3 indicates that item at
-    // index 1 is active, and the user has scrolled 30% towards the item at
-    // index 2.
-    final active = viewportOffset.pixels / itemExtent;
-
-    // Index of the first item we need to paint at this moment.
-    // At most, we paint 3 items to the left of the active item.
-    final min = math.max(0, active.floor() - 3).toInt();
-
-    // Index of the last item we need to paint at this moment.
-    // At most, we paint 3 items to the right of the active item.
-    final max = math.min(count - 1, active.ceil() + 3).toInt();
-
-    // Generate transforms for the visible items and sort by distance.
-    for (var index = min; index <= max; index++) {
-      final itemXFromCenter = itemExtent * index - viewportOffset.pixels;
-      final percentFromCenter = 1.0 - (itemXFromCenter / (size / 2)).abs();
-      final itemScale = 0.5 + (percentFromCenter * 0.5);
-      final opacity = 0.25 + (percentFromCenter * 0.75);
-
-      final itemTransform = Matrix4.identity()
-        ..translate((size - itemExtent) / 2)
-        ..translate(itemXFromCenter)
-        ..translate(itemExtent / 2, itemExtent / 2)
-        ..multiply(Matrix4.diagonal3Values(itemScale, itemScale, 1.0))
-        ..translate(-itemExtent / 2, -itemExtent / 2);
-
-      context.paintChild(
-        index,
-        transform: itemTransform,
-        opacity: opacity,
-      );
-    }
-  }
-
-  @override
-  bool shouldRepaint(covariant CarouselFlowDelegate oldDelegate) {
-    return oldDelegate.viewportOffset != viewportOffset;
-  }
-}
-
-@immutable
-class FilterItem extends StatelessWidget {
-  const FilterItem({
-    super.key,
-    required this.color,
-    this.onFilterSelected,
-  });
-
-  final Color color;
-  final VoidCallback? onFilterSelected;
-
-  @override
-  Widget build(BuildContext context) {
-    return GestureDetector(
-      onTap: onFilterSelected,
-      child: AspectRatio(
-        aspectRatio: 1.0,
-        child: Padding(
-          padding: const EdgeInsets.all(8),
-          child: ClipOval(
-            child: Image.network(
-              'https://docs.flutter.dev/cookbook/img-files'
-              '/effects/instagram-buttons/millennial-texture.jpg',
-              color: color.withOpacity(0.5),
-              colorBlendMode: BlendMode.hardLight,
-            ),
-          ),
-        ),
-      ),
-    );
-  }
-}
diff --git a/examples/cookbook/effects/photo_filter_carousel/lib/original_example.dart b/examples/cookbook/effects/photo_filter_carousel/lib/original_example.dart
deleted file mode 100644
index 05c9c3feae6..00000000000
--- a/examples/cookbook/effects/photo_filter_carousel/lib/original_example.dart
+++ /dev/null
@@ -1,281 +0,0 @@
-// ignore_for_file: unused_element
-
-import 'package:flutter/material.dart';
-
-@immutable
-class ExampleInstagramFilterSelection extends StatefulWidget {
-  const ExampleInstagramFilterSelection({super.key});
-
-  @override
-  State<ExampleInstagramFilterSelection> createState() =>
-      _ExampleInstagramFilterSelectionState();
-}
-
-class _ExampleInstagramFilterSelectionState
-    extends State<ExampleInstagramFilterSelection> {
-  final _filters = [
-    Colors.white,
-    ...List.generate(
-      Colors.primaries.length,
-      (index) => Colors.primaries[(index * 4) % Colors.primaries.length],
-    )
-  ];
-
-  final _filterColor = ValueNotifier<Color>(Colors.white);
-
-  void _onFilterChanged(Color value) {
-    _filterColor.value = value;
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Material(
-      color: Colors.black,
-      child: Stack(
-        children: [
-          Positioned.fill(
-            child: _buildPhotoWithFilter(),
-          ),
-          Positioned(
-            left: 0.0,
-            right: 0.0,
-            bottom: 0.0,
-            child: FilterSelector(
-              onFilterChanged: _onFilterChanged,
-              filters: _filters,
-            ),
-          ),
-        ],
-      ),
-    );
-  }
-
-  Widget _buildPhotoWithFilter() {
-    return ValueListenableBuilder(
-      valueListenable: _filterColor,
-      builder: (context, color, child) {
-        return Image.network(
-          'https://docs.flutter.dev/cookbook/img-files'
-          '/effects/instagram-buttons/millennial-dude.jpg',
-          color: color.withOpacity(0.5),
-          colorBlendMode: BlendMode.color,
-          fit: BoxFit.cover,
-        );
-      },
-    );
-  }
-}
-
-@immutable
-class FilterSelector extends StatefulWidget {
-  const FilterSelector({
-    super.key,
-    required this.filters,
-    required this.onFilterChanged,
-    this.padding = const EdgeInsets.symmetric(vertical: 24),
-  });
-
-  final List<Color> filters;
-  final void Function(Color selectedColor) onFilterChanged;
-  final EdgeInsets padding;
-
-  @override
-  State<FilterSelector> createState() => _FilterSelectorState();
-}
-
-class _FilterSelectorState extends State<FilterSelector> {
-  static const _filtersPerScreen = 5;
-  static const _viewportFractionPerItem = 1.0 / _filtersPerScreen;
-
-  late final PageController _controller;
-
-  Color itemColor(int index) => widget.filters[index % widget.filters.length];
-
-  @override
-  void initState() {
-    super.initState();
-    _controller = PageController(
-      viewportFraction: _viewportFractionPerItem,
-    );
-    _controller.addListener(_onPageChanged);
-  }
-
-  void _onPageChanged() {
-    final page = (_controller.page ?? 0).round();
-    widget.onFilterChanged(widget.filters[page]);
-  }
-
-  // #docregion FilterTapped
-  void _onFilterTapped(int index) {
-    _controller.animateToPage(
-      index,
-      duration: const Duration(milliseconds: 450),
-      curve: Curves.ease,
-    );
-  }
-  // #enddocregion FilterTapped
-
-  @override
-  void dispose() {
-    _controller.dispose();
-    super.dispose();
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return LayoutBuilder(builder: (context, constraints) {
-      final itemSize = constraints.maxWidth * _viewportFractionPerItem;
-
-      return Stack(
-        alignment: Alignment.bottomCenter,
-        children: [
-          _buildShadowGradient(itemSize),
-          _buildCarousel(itemSize),
-          _buildSelectionRing(itemSize),
-        ],
-      );
-    });
-  }
-
-  Widget _buildShadowGradient(double itemSize) {
-    return SizedBox(
-      height: itemSize * 2 + widget.padding.vertical,
-      child: const DecoratedBox(
-        decoration: BoxDecoration(
-          gradient: LinearGradient(
-            begin: Alignment.topCenter,
-            end: Alignment.bottomCenter,
-            colors: [
-              Colors.transparent,
-              Colors.black,
-            ],
-          ),
-        ),
-        child: SizedBox.expand(),
-      ),
-    );
-  }
-
-  // #docregion final-build-carousel
-  Widget _buildCarousel(double itemSize) {
-    return Container(
-      height: itemSize,
-      margin: widget.padding,
-      child: PageView.builder(
-        controller: _controller,
-        itemCount: widget.filters.length,
-        itemBuilder: (context, index) {
-          return Center(
-            child: AnimatedBuilder(
-              animation: _controller,
-              builder: (context, child) {
-                if (!_controller.hasClients ||
-                    !_controller.position.hasContentDimensions) {
-                  // The PageViewController isn't connected to the
-                  // PageView widget yet. Return an empty box.
-                  return const SizedBox();
-                }
-
-                // The integer index of the current page,
-                // 0, 1, 2, 3, and so on
-                final selectedIndex = _controller.page!.roundToDouble();
-
-                // The fractional amount that the current filter
-                // is dragged to the left or right, for example, 0.25 when
-                // the current filter is dragged 25% to the left.
-                final pageScrollAmount = _controller.page! - selectedIndex;
-
-                // The page-distance of a filter just before it
-                // moves off-screen.
-                const maxScrollDistance = _filtersPerScreen / 2;
-
-                // The page-distance of this filter item from the
-                // currently selected filter item.
-                final pageDistanceFromSelected =
-                    (selectedIndex - index + pageScrollAmount).abs();
-
-                // The distance of this filter item from the
-                // center of the carousel as a percentage, that is, where the selector
-                // ring sits.
-                final percentFromCenter =
-                    1.0 - pageDistanceFromSelected / maxScrollDistance;
-
-                final itemScale = 0.5 + (percentFromCenter * 0.5);
-                final opacity = 0.25 + (percentFromCenter * 0.75);
-
-                return Transform.scale(
-                  scale: itemScale,
-                  child: Opacity(
-                    opacity: opacity,
-                    // #docregion OnFilterTapped
-                    child: FilterItem(
-                      color: itemColor(index),
-                      onFilterSelected: () => () {},
-                    ),
-                    // #enddocregion OnFilterTapped
-                  ),
-                );
-              },
-            ),
-          );
-        },
-      ),
-    );
-  }
-  // #enddocregion final-build-carousel
-
-  Widget _buildSelectionRing(double itemSize) {
-    return IgnorePointer(
-      child: Padding(
-        padding: widget.padding,
-        child: SizedBox(
-          width: itemSize,
-          height: itemSize,
-          child: const DecoratedBox(
-            decoration: BoxDecoration(
-              shape: BoxShape.circle,
-              border: Border.fromBorderSide(
-                BorderSide(width: 6, color: Colors.white),
-              ),
-            ),
-          ),
-        ),
-      ),
-    );
-  }
-}
-
-// #docregion filter-item
-@immutable
-class FilterItem extends StatelessWidget {
-  const FilterItem({
-    super.key,
-    required this.color,
-    this.onFilterSelected,
-  });
-
-  final Color color;
-  final VoidCallback? onFilterSelected;
-
-  @override
-  Widget build(BuildContext context) {
-    return GestureDetector(
-      onTap: onFilterSelected,
-      child: AspectRatio(
-        aspectRatio: 1.0,
-        child: Padding(
-          padding: const EdgeInsets.all(8),
-          child: ClipOval(
-            child: Image.network(
-              'https://docs.flutter.dev/cookbook/img-files'
-              '/effects/instagram-buttons/millennial-texture.jpg',
-              color: color.withOpacity(0.5),
-              colorBlendMode: BlendMode.hardLight,
-            ),
-          ),
-        ),
-      ),
-    );
-  }
-}
-// #enddocregion filter-item
diff --git a/examples/cookbook/effects/photo_filter_carousel/pubspec.yaml b/examples/cookbook/effects/photo_filter_carousel/pubspec.yaml
deleted file mode 100644
index a807b1bfedd..00000000000
--- a/examples/cookbook/effects/photo_filter_carousel/pubspec.yaml
+++ /dev/null
@@ -1,23 +0,0 @@
-name: photo_filter_carousel
-description: A new Flutter project.
-
-publish_to: none
-
-version: 1.0.0+1
-
-environment:
-  sdk: ^3.5.0
-
-dependencies:
-  flutter:
-    sdk: flutter
-  cupertino_icons: ^1.0.8
-
-dev_dependencies:
-  example_utils:
-    path: ../../../example_utils
-  flutter_test:
-    sdk: flutter
-
-flutter:
-  uses-material-design: true
diff --git a/examples/cookbook/effects/shimmer_loading/pubspec.yaml b/examples/cookbook/effects/shimmer_loading/pubspec.yaml
index 8619a88c5cf..7733834d145 100644
--- a/examples/cookbook/effects/shimmer_loading/pubspec.yaml
+++ b/examples/cookbook/effects/shimmer_loading/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/effects/staggered_menu_animation/pubspec.yaml b/examples/cookbook/effects/staggered_menu_animation/pubspec.yaml
index c3acb3716ee..723117688e0 100644
--- a/examples/cookbook/effects/staggered_menu_animation/pubspec.yaml
+++ b/examples/cookbook/effects/staggered_menu_animation/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/effects/typing_indicator/pubspec.yaml b/examples/cookbook/effects/typing_indicator/pubspec.yaml
index 83e1bed5b1f..fdd5577f42c 100644
--- a/examples/cookbook/effects/typing_indicator/pubspec.yaml
+++ b/examples/cookbook/effects/typing_indicator/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/forms/focus/pubspec.yaml b/examples/cookbook/forms/focus/pubspec.yaml
index 4d8a7ac1f81..89357e7d3a2 100644
--- a/examples/cookbook/forms/focus/pubspec.yaml
+++ b/examples/cookbook/forms/focus/pubspec.yaml
@@ -2,7 +2,7 @@ name: focus
 description: Sample code for focus cookbook recipe.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/forms/retrieve_input/pubspec.yaml b/examples/cookbook/forms/retrieve_input/pubspec.yaml
index 368e402e172..78eaaef5a73 100644
--- a/examples/cookbook/forms/retrieve_input/pubspec.yaml
+++ b/examples/cookbook/forms/retrieve_input/pubspec.yaml
@@ -2,7 +2,7 @@ name: retrieve_input
 description: Sample code for retrieve_input cookbook recipe.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/forms/text_field_changes/pubspec.yaml b/examples/cookbook/forms/text_field_changes/pubspec.yaml
index 95fbd683b02..309e81c9b14 100644
--- a/examples/cookbook/forms/text_field_changes/pubspec.yaml
+++ b/examples/cookbook/forms/text_field_changes/pubspec.yaml
@@ -2,7 +2,7 @@ name: text_field_changes
 description: Sample code for text_field_changes
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/forms/text_input/pubspec.yaml b/examples/cookbook/forms/text_input/pubspec.yaml
index 610b95650f2..d2f5120a448 100644
--- a/examples/cookbook/forms/text_input/pubspec.yaml
+++ b/examples/cookbook/forms/text_input/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/forms/validation/pubspec.yaml b/examples/cookbook/forms/validation/pubspec.yaml
index 89a82c37457..4ff8d0c5793 100644
--- a/examples/cookbook/forms/validation/pubspec.yaml
+++ b/examples/cookbook/forms/validation/pubspec.yaml
@@ -2,7 +2,7 @@ name: form
 description: Use Form widget to perform form validation.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/games/achievements_leaderboards/pubspec.yaml b/examples/cookbook/games/achievements_leaderboards/pubspec.yaml
index e8a16045df7..32ccce52e8d 100644
--- a/examples/cookbook/games/achievements_leaderboards/pubspec.yaml
+++ b/examples/cookbook/games/achievements_leaderboards/pubspec.yaml
@@ -2,7 +2,7 @@ name: games_services_example
 description: Games services
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/games/firestore_multiplayer/pubspec.yaml b/examples/cookbook/games/firestore_multiplayer/pubspec.yaml
index e4216746282..20695927882 100644
--- a/examples/cookbook/games/firestore_multiplayer/pubspec.yaml
+++ b/examples/cookbook/games/firestore_multiplayer/pubspec.yaml
@@ -2,7 +2,7 @@ name: firestore_multiplayer
 description: Firestore multiplayer
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/gestures/dismissible/pubspec.yaml b/examples/cookbook/gestures/dismissible/pubspec.yaml
index 0b91766d528..501a73e8e69 100644
--- a/examples/cookbook/gestures/dismissible/pubspec.yaml
+++ b/examples/cookbook/gestures/dismissible/pubspec.yaml
@@ -2,7 +2,7 @@ name: dismissible
 description: Sample code for dismissible cookbook recipe.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/gestures/handling_taps/pubspec.yaml b/examples/cookbook/gestures/handling_taps/pubspec.yaml
index 67b4017f95a..0eea1d206cb 100644
--- a/examples/cookbook/gestures/handling_taps/pubspec.yaml
+++ b/examples/cookbook/gestures/handling_taps/pubspec.yaml
@@ -2,7 +2,7 @@ name: handling_taps
 description: Example on handling_taps cookbook recipe.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/gestures/ripples/pubspec.yaml b/examples/cookbook/gestures/ripples/pubspec.yaml
index 5d4b8dca5e1..7fc150f6a69 100644
--- a/examples/cookbook/gestures/ripples/pubspec.yaml
+++ b/examples/cookbook/gestures/ripples/pubspec.yaml
@@ -2,7 +2,7 @@ name: ripples
 description: Example for ripples cookbook recipe
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/images/cached_images/pubspec.yaml b/examples/cookbook/images/cached_images/pubspec.yaml
index 700a8740ce9..a0ff355e0c6 100644
--- a/examples/cookbook/images/cached_images/pubspec.yaml
+++ b/examples/cookbook/images/cached_images/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/images/fading_in_images/pubspec.yaml b/examples/cookbook/images/fading_in_images/pubspec.yaml
index cfb0fe4b3ed..aa0c7c592f7 100644
--- a/examples/cookbook/images/fading_in_images/pubspec.yaml
+++ b/examples/cookbook/images/fading_in_images/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/images/network_image/pubspec.yaml b/examples/cookbook/images/network_image/pubspec.yaml
index db1b745873d..2d427b4b556 100644
--- a/examples/cookbook/images/network_image/pubspec.yaml
+++ b/examples/cookbook/images/network_image/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/lists/basic_list/pubspec.yaml b/examples/cookbook/lists/basic_list/pubspec.yaml
index 7ef09c54cd6..1525f012260 100644
--- a/examples/cookbook/lists/basic_list/pubspec.yaml
+++ b/examples/cookbook/lists/basic_list/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/lists/floating_app_bar/pubspec.yaml b/examples/cookbook/lists/floating_app_bar/pubspec.yaml
index 67eaedef943..bc1a765bf7c 100644
--- a/examples/cookbook/lists/floating_app_bar/pubspec.yaml
+++ b/examples/cookbook/lists/floating_app_bar/pubspec.yaml
@@ -2,7 +2,7 @@ name: floating_app_bar
 description: Example for floating_app_bar cookbook recipe
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/lists/grid_lists/pubspec.yaml b/examples/cookbook/lists/grid_lists/pubspec.yaml
index 4db22fdc7d3..e5b1f584cf3 100644
--- a/examples/cookbook/lists/grid_lists/pubspec.yaml
+++ b/examples/cookbook/lists/grid_lists/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/lists/horizontal_list/pubspec.yaml b/examples/cookbook/lists/horizontal_list/pubspec.yaml
index 78c9577cdbf..1186b522e62 100644
--- a/examples/cookbook/lists/horizontal_list/pubspec.yaml
+++ b/examples/cookbook/lists/horizontal_list/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/lists/long_lists/pubspec.yaml b/examples/cookbook/lists/long_lists/pubspec.yaml
index a735b72525d..3f3405a2567 100644
--- a/examples/cookbook/lists/long_lists/pubspec.yaml
+++ b/examples/cookbook/lists/long_lists/pubspec.yaml
@@ -2,7 +2,7 @@ name: long_lists
 description: Example for long_lists cookbook recipe
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/lists/mixed_list/pubspec.yaml b/examples/cookbook/lists/mixed_list/pubspec.yaml
index b5754e8878e..8ff0eac88f5 100644
--- a/examples/cookbook/lists/mixed_list/pubspec.yaml
+++ b/examples/cookbook/lists/mixed_list/pubspec.yaml
@@ -2,7 +2,7 @@ name: mixed_lists
 description: Example for mixed_lists cookbook recipe
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/lists/spaced_items/pubspec.yaml b/examples/cookbook/lists/spaced_items/pubspec.yaml
index 4e411fe8791..815ce04e268 100644
--- a/examples/cookbook/lists/spaced_items/pubspec.yaml
+++ b/examples/cookbook/lists/spaced_items/pubspec.yaml
@@ -2,7 +2,7 @@ name: spaced_items
 description: Example for spaced_items cookbook recipe
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/maintenance/error_reporting/pubspec.yaml b/examples/cookbook/maintenance/error_reporting/pubspec.yaml
index 2ac8c6476c7..4e66da6d843 100644
--- a/examples/cookbook/maintenance/error_reporting/pubspec.yaml
+++ b/examples/cookbook/maintenance/error_reporting/pubspec.yaml
@@ -3,7 +3,7 @@ description: Error reporting example using sentry.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/navigation/hero_animations/pubspec.yaml b/examples/cookbook/navigation/hero_animations/pubspec.yaml
index fafc9a8dd41..f8f5332378d 100644
--- a/examples/cookbook/navigation/hero_animations/pubspec.yaml
+++ b/examples/cookbook/navigation/hero_animations/pubspec.yaml
@@ -2,7 +2,7 @@ name: hero_animations
 description: Hero animations
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/navigation/named_routes/pubspec.yaml b/examples/cookbook/navigation/named_routes/pubspec.yaml
index 8c580808649..902eb370512 100644
--- a/examples/cookbook/navigation/named_routes/pubspec.yaml
+++ b/examples/cookbook/navigation/named_routes/pubspec.yaml
@@ -2,7 +2,7 @@ name: navigate_with_arguments
 description: Use Form widget to perform form validation.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/navigation/navigate_with_arguments/pubspec.yaml b/examples/cookbook/navigation/navigate_with_arguments/pubspec.yaml
index 8c580808649..902eb370512 100644
--- a/examples/cookbook/navigation/navigate_with_arguments/pubspec.yaml
+++ b/examples/cookbook/navigation/navigate_with_arguments/pubspec.yaml
@@ -2,7 +2,7 @@ name: navigate_with_arguments
 description: Use Form widget to perform form validation.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/navigation/navigation_basics/pubspec.yaml b/examples/cookbook/navigation/navigation_basics/pubspec.yaml
index 5bbe670ec04..18366138f24 100644
--- a/examples/cookbook/navigation/navigation_basics/pubspec.yaml
+++ b/examples/cookbook/navigation/navigation_basics/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/navigation/passing_data/pubspec.yaml b/examples/cookbook/navigation/passing_data/pubspec.yaml
index 68574767ee7..728d76cc9f4 100644
--- a/examples/cookbook/navigation/passing_data/pubspec.yaml
+++ b/examples/cookbook/navigation/passing_data/pubspec.yaml
@@ -2,7 +2,7 @@ name: passing_data
 description: Passing data
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/navigation/returning_data/pubspec.yaml b/examples/cookbook/navigation/returning_data/pubspec.yaml
index 2c0757d9bae..5ec1b9cf556 100644
--- a/examples/cookbook/navigation/returning_data/pubspec.yaml
+++ b/examples/cookbook/navigation/returning_data/pubspec.yaml
@@ -2,7 +2,7 @@ name: returning_data
 description: Returning data
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/networking/authenticated_requests/pubspec.yaml b/examples/cookbook/networking/authenticated_requests/pubspec.yaml
index 3ad43876429..d66bb7f541e 100644
--- a/examples/cookbook/networking/authenticated_requests/pubspec.yaml
+++ b/examples/cookbook/networking/authenticated_requests/pubspec.yaml
@@ -2,7 +2,7 @@ name: hero_animations
 description: Hero animations
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/networking/background_parsing/pubspec.yaml b/examples/cookbook/networking/background_parsing/pubspec.yaml
index 44468996392..712a5b1ca09 100644
--- a/examples/cookbook/networking/background_parsing/pubspec.yaml
+++ b/examples/cookbook/networking/background_parsing/pubspec.yaml
@@ -2,7 +2,7 @@ name: background_parsing
 description: Background parsing
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/networking/delete_data/pubspec.yaml b/examples/cookbook/networking/delete_data/pubspec.yaml
index 80cd687a698..5d458e2d84d 100644
--- a/examples/cookbook/networking/delete_data/pubspec.yaml
+++ b/examples/cookbook/networking/delete_data/pubspec.yaml
@@ -2,7 +2,7 @@ name: delete_data
 description: Delete Data
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/networking/fetch_data/pubspec.yaml b/examples/cookbook/networking/fetch_data/pubspec.yaml
index 640e267a99a..38ae0112165 100644
--- a/examples/cookbook/networking/fetch_data/pubspec.yaml
+++ b/examples/cookbook/networking/fetch_data/pubspec.yaml
@@ -2,7 +2,7 @@ name: fetch_data
 description: Fetch Data
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/networking/send_data/pubspec.yaml b/examples/cookbook/networking/send_data/pubspec.yaml
index d9ebb9a185d..f68ac557daa 100644
--- a/examples/cookbook/networking/send_data/pubspec.yaml
+++ b/examples/cookbook/networking/send_data/pubspec.yaml
@@ -2,7 +2,7 @@ name: send_data
 description: Send data
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/networking/update_data/pubspec.yaml b/examples/cookbook/networking/update_data/pubspec.yaml
index 64fccb0222a..a786018026e 100644
--- a/examples/cookbook/networking/update_data/pubspec.yaml
+++ b/examples/cookbook/networking/update_data/pubspec.yaml
@@ -2,7 +2,7 @@ name: update_data
 description: Update Data
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/networking/web_sockets/pubspec.yaml b/examples/cookbook/networking/web_sockets/pubspec.yaml
index e6bfb09ae78..53843ac9492 100644
--- a/examples/cookbook/networking/web_sockets/pubspec.yaml
+++ b/examples/cookbook/networking/web_sockets/pubspec.yaml
@@ -2,7 +2,7 @@ name: web_sockets
 description: Web Sockets
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/persistence/key_value/pubspec.yaml b/examples/cookbook/persistence/key_value/pubspec.yaml
index fb8cf39de7d..f3d2717231a 100644
--- a/examples/cookbook/persistence/key_value/pubspec.yaml
+++ b/examples/cookbook/persistence/key_value/pubspec.yaml
@@ -5,7 +5,7 @@ description: >-
   shows how to use the shared_preferences package.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/persistence/reading_writing_files/pubspec.yaml b/examples/cookbook/persistence/reading_writing_files/pubspec.yaml
index 9aafa40a8ea..78cfc27d13b 100644
--- a/examples/cookbook/persistence/reading_writing_files/pubspec.yaml
+++ b/examples/cookbook/persistence/reading_writing_files/pubspec.yaml
@@ -2,7 +2,7 @@ name: reading_writing_files
 description: Reading and Writing Files
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/persistence/sqlite/pubspec.yaml b/examples/cookbook/persistence/sqlite/pubspec.yaml
index 7baa9bb6a68..df019115c6e 100644
--- a/examples/cookbook/persistence/sqlite/pubspec.yaml
+++ b/examples/cookbook/persistence/sqlite/pubspec.yaml
@@ -2,7 +2,7 @@ name: sqlite
 description: Example of using sqflite plugin to access SQLite database.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/plugins/google_mobile_ads/pubspec.yaml b/examples/cookbook/plugins/google_mobile_ads/pubspec.yaml
index 09f8a80d5ff..6a573e36fbf 100644
--- a/examples/cookbook/plugins/google_mobile_ads/pubspec.yaml
+++ b/examples/cookbook/plugins/google_mobile_ads/pubspec.yaml
@@ -2,7 +2,7 @@ name: google_mobile_ads_example
 description: Google mobile ads
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/plugins/picture_using_camera/pubspec.yaml b/examples/cookbook/plugins/picture_using_camera/pubspec.yaml
index d63a1b27c9a..8ef419c05b0 100644
--- a/examples/cookbook/plugins/picture_using_camera/pubspec.yaml
+++ b/examples/cookbook/plugins/picture_using_camera/pubspec.yaml
@@ -2,7 +2,7 @@ name: picture_using_camera
 description: A new Flutter project.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/plugins/play_video/pubspec.yaml b/examples/cookbook/plugins/play_video/pubspec.yaml
index 7a0a0725c52..701054aaa16 100644
--- a/examples/cookbook/plugins/play_video/pubspec.yaml
+++ b/examples/cookbook/plugins/play_video/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: none # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/testing/integration/introduction/pubspec.yaml b/examples/cookbook/testing/integration/introduction/pubspec.yaml
index 9b5cb80affd..8fdbb5d815f 100644
--- a/examples/cookbook/testing/integration/introduction/pubspec.yaml
+++ b/examples/cookbook/testing/integration/introduction/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: none # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/testing/integration/profiling/pubspec.yaml b/examples/cookbook/testing/integration/profiling/pubspec.yaml
index c105c889d7c..c042679bc5d 100644
--- a/examples/cookbook/testing/integration/profiling/pubspec.yaml
+++ b/examples/cookbook/testing/integration/profiling/pubspec.yaml
@@ -2,7 +2,7 @@ name: scrolling
 description: A new Flutter project.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/testing/unit/counter_app/pubspec.yaml b/examples/cookbook/testing/unit/counter_app/pubspec.yaml
index 04a2aacb031..5e8f7705796 100644
--- a/examples/cookbook/testing/unit/counter_app/pubspec.yaml
+++ b/examples/cookbook/testing/unit/counter_app/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/testing/unit/mocking/pubspec.yaml b/examples/cookbook/testing/unit/mocking/pubspec.yaml
index 29ab8f5fe52..12f9343a65a 100644
--- a/examples/cookbook/testing/unit/mocking/pubspec.yaml
+++ b/examples/cookbook/testing/unit/mocking/pubspec.yaml
@@ -2,7 +2,7 @@ name: mocking
 description: Use the Mockito package to mimic the behavior of services for testing.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/testing/widget/finders/pubspec.yaml b/examples/cookbook/testing/widget/finders/pubspec.yaml
index 9fecdd82b6a..63a6a54b555 100644
--- a/examples/cookbook/testing/widget/finders/pubspec.yaml
+++ b/examples/cookbook/testing/widget/finders/pubspec.yaml
@@ -2,7 +2,7 @@ name: finders
 description: A new Flutter project.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/testing/widget/introduction/pubspec.yaml b/examples/cookbook/testing/widget/introduction/pubspec.yaml
index c1f3a72f370..ace70a866c8 100644
--- a/examples/cookbook/testing/widget/introduction/pubspec.yaml
+++ b/examples/cookbook/testing/widget/introduction/pubspec.yaml
@@ -2,7 +2,7 @@ name: introduction
 description: A new Flutter project.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/testing/widget/scrolling/pubspec.yaml b/examples/cookbook/testing/widget/scrolling/pubspec.yaml
index 9af9e153f16..42861e8fcfb 100644
--- a/examples/cookbook/testing/widget/scrolling/pubspec.yaml
+++ b/examples/cookbook/testing/widget/scrolling/pubspec.yaml
@@ -2,7 +2,7 @@ name: scrolling
 description: A new Flutter project.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/cookbook/testing/widget/tap_drag/pubspec.yaml b/examples/cookbook/testing/widget/tap_drag/pubspec.yaml
index 9fecdd82b6a..63a6a54b555 100644
--- a/examples/cookbook/testing/widget/tap_drag/pubspec.yaml
+++ b/examples/cookbook/testing/widget/tap_drag/pubspec.yaml
@@ -2,7 +2,7 @@ name: finders
 description: A new Flutter project.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/data-and-backend/json/pubspec.yaml b/examples/data-and-backend/json/pubspec.yaml
index 137b1bf5feb..f73336397d0 100644
--- a/examples/data-and-backend/json/pubspec.yaml
+++ b/examples/data-and-backend/json/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   json_annotation: ^4.8.1
diff --git a/examples/deployment/obfuscate/pubspec.yaml b/examples/deployment/obfuscate/pubspec.yaml
index d9663369467..1c75769ac42 100644
--- a/examples/deployment/obfuscate/pubspec.yaml
+++ b/examples/deployment/obfuscate/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/example_utils/pubspec.yaml b/examples/example_utils/pubspec.yaml
index 3805c27e6bd..2369c497bca 100644
--- a/examples/example_utils/pubspec.yaml
+++ b/examples/example_utils/pubspec.yaml
@@ -3,7 +3,7 @@ description: Utils for examples and code snippets on docs.flutter.dev.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter_lints: ^5.0.0
diff --git a/examples/get-started/codelab_web/lib/main.dart b/examples/get-started/codelab_web/lib/main.dart
index 4a75c605c55..f934316d65a 100644
--- a/examples/get-started/codelab_web/lib/main.dart
+++ b/examples/get-started/codelab_web/lib/main.dart
@@ -200,7 +200,7 @@ class _AnimatedProgressIndicatorState extends State<AnimatedProgressIndicator>
       builder: (context, child) => LinearProgressIndicator(
         value: _curveAnimation.value,
         valueColor: _colorAnimation,
-        backgroundColor: _colorAnimation.value?.withOpacity(0.4),
+        backgroundColor: _colorAnimation.value?.withValues(alpha: 0.4),
       ),
     );
   }
diff --git a/examples/get-started/codelab_web/lib/step3.dart b/examples/get-started/codelab_web/lib/step3.dart
index d22358040fc..e940291fb3c 100644
--- a/examples/get-started/codelab_web/lib/step3.dart
+++ b/examples/get-started/codelab_web/lib/step3.dart
@@ -204,7 +204,7 @@ class _AnimatedProgressIndicatorState extends State<AnimatedProgressIndicator>
       builder: (context, child) => LinearProgressIndicator(
         value: _curveAnimation.value,
         valueColor: _colorAnimation,
-        backgroundColor: _colorAnimation.value?.withOpacity(0.4),
+        backgroundColor: _colorAnimation.value?.withValues(alpha: 0.4),
       ),
     );
   }
diff --git a/examples/get-started/codelab_web/pubspec.yaml b/examples/get-started/codelab_web/pubspec.yaml
index 541f54c34ae..7646fb3d788 100644
--- a/examples/get-started/codelab_web/pubspec.yaml
+++ b/examples/get-started/codelab_web/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/get-started/flutter-for/android_devs/pubspec.yaml b/examples/get-started/flutter-for/android_devs/pubspec.yaml
index bc6299829b5..5bc67268852 100644
--- a/examples/get-started/flutter-for/android_devs/pubspec.yaml
+++ b/examples/get-started/flutter-for/android_devs/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/get-started/flutter-for/declarative/pubspec.yaml b/examples/get-started/flutter-for/declarative/pubspec.yaml
index 229fa45e678..cbec3c200bf 100644
--- a/examples/get-started/flutter-for/declarative/pubspec.yaml
+++ b/examples/get-started/flutter-for/declarative/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/get-started/flutter-for/ios_devs/pubspec.yaml b/examples/get-started/flutter-for/ios_devs/pubspec.yaml
index aabca4a8e74..58e72b49d09 100644
--- a/examples/get-started/flutter-for/ios_devs/pubspec.yaml
+++ b/examples/get-started/flutter-for/ios_devs/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/get-started/flutter-for/react_native_devs/my_widgets/pubspec.yaml b/examples/get-started/flutter-for/react_native_devs/my_widgets/pubspec.yaml
index 255f7a24ce0..7946b75216a 100644
--- a/examples/get-started/flutter-for/react_native_devs/my_widgets/pubspec.yaml
+++ b/examples/get-started/flutter-for/react_native_devs/my_widgets/pubspec.yaml
@@ -3,7 +3,7 @@ description: A library for `react_native_devs` to import.
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dev_dependencies:
   example_utils:
diff --git a/examples/get-started/flutter-for/react_native_devs/pubspec.yaml b/examples/get-started/flutter-for/react_native_devs/pubspec.yaml
index e13cd3eb2c7..5fe234ba980 100644
--- a/examples/get-started/flutter-for/react_native_devs/pubspec.yaml
+++ b/examples/get-started/flutter-for/react_native_devs/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/get-started/flutter-for/web_devs/pubspec.yaml b/examples/get-started/flutter-for/web_devs/pubspec.yaml
index ea4a2fc03c4..028ca38ed25 100644
--- a/examples/get-started/flutter-for/web_devs/pubspec.yaml
+++ b/examples/get-started/flutter-for/web_devs/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/get-started/flutter-for/xamarin_devs/pubspec.yaml b/examples/get-started/flutter-for/xamarin_devs/pubspec.yaml
index 2cfdde95a26..be6f7d12be1 100644
--- a/examples/get-started/flutter-for/xamarin_devs/pubspec.yaml
+++ b/examples/get-started/flutter-for/xamarin_devs/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/googleapis/pubspec.yaml b/examples/googleapis/pubspec.yaml
index 9aa4907b5b7..8a7db4f5beb 100644
--- a/examples/googleapis/pubspec.yaml
+++ b/examples/googleapis/pubspec.yaml
@@ -2,7 +2,7 @@ name: google_sign_in_example
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   collection: any # Pull the version of collection from Flutter.
diff --git a/examples/integration_test/pubspec.yaml b/examples/integration_test/pubspec.yaml
index cbeb9bb0761..11b5e96a818 100644
--- a/examples/integration_test/pubspec.yaml
+++ b/examples/integration_test/pubspec.yaml
@@ -3,7 +3,7 @@ publish_to: none
 version: 0.0.1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/integration_test_migration/pubspec.yaml b/examples/integration_test_migration/pubspec.yaml
index 19ad4dc5e77..eb94adbe085 100644
--- a/examples/integration_test_migration/pubspec.yaml
+++ b/examples/integration_test_migration/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/internationalization/add_language/pubspec.yaml b/examples/internationalization/add_language/pubspec.yaml
index fab91909269..c14bb9f42ea 100644
--- a/examples/internationalization/add_language/pubspec.yaml
+++ b/examples/internationalization/add_language/pubspec.yaml
@@ -2,7 +2,7 @@ name: add_language
 description: An i18n app example that adds a supported language
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/internationalization/gen_l10n_example/pubspec.yaml b/examples/internationalization/gen_l10n_example/pubspec.yaml
index b12d258fd77..637d5de74aa 100644
--- a/examples/internationalization/gen_l10n_example/pubspec.yaml
+++ b/examples/internationalization/gen_l10n_example/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
   Example of an internationalized Flutter app that uses `flutter gen-l10n`.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 # #docregion flutter-localizations
 dependencies:
diff --git a/examples/internationalization/intl_example/pubspec.yaml b/examples/internationalization/intl_example/pubspec.yaml
index 5d3ef732b14..3d98729cc66 100644
--- a/examples/internationalization/intl_example/pubspec.yaml
+++ b/examples/internationalization/intl_example/pubspec.yaml
@@ -2,7 +2,7 @@ name: intl_example
 description: Example of a Flutter app using the intl library services.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/internationalization/minimal/pubspec.yaml b/examples/internationalization/minimal/pubspec.yaml
index d718cc2566b..8c03586e486 100644
--- a/examples/internationalization/minimal/pubspec.yaml
+++ b/examples/internationalization/minimal/pubspec.yaml
@@ -2,7 +2,7 @@ name: l10n_example
 description: A minimal example of a localized Flutter app
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/base/pubspec.yaml b/examples/layout/base/pubspec.yaml
index 2169f959bb5..4d3d0f452bb 100644
--- a/examples/layout/base/pubspec.yaml
+++ b/examples/layout/base/pubspec.yaml
@@ -4,7 +4,7 @@ description: >
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/card_and_stack/pubspec.yaml b/examples/layout/card_and_stack/pubspec.yaml
index be031f6b0bc..8235c6e6bb2 100644
--- a/examples/layout/card_and_stack/pubspec.yaml
+++ b/examples/layout/card_and_stack/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/constraints/pubspec.yaml b/examples/layout/constraints/pubspec.yaml
index 9437877dccc..d8bda512398 100644
--- a/examples/layout/constraints/pubspec.yaml
+++ b/examples/layout/constraints/pubspec.yaml
@@ -3,7 +3,7 @@ description: example for ui/layout/constraints
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/container/pubspec.yaml b/examples/layout/container/pubspec.yaml
index a00ee385b4a..726a22bb475 100644
--- a/examples/layout/container/pubspec.yaml
+++ b/examples/layout/container/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/gallery/lib/bottom_navigation_demo.dart b/examples/layout/gallery/lib/bottom_navigation_demo.dart
index 15c3146cb23..23e9626e743 100644
--- a/examples/layout/gallery/lib/bottom_navigation_demo.dart
+++ b/examples/layout/gallery/lib/bottom_navigation_demo.dart
@@ -114,7 +114,7 @@ class _BottomNavigationDemoState extends State<BottomNavigationDemo>
             });
           },
           selectedItemColor: colorScheme.onPrimary,
-          unselectedItemColor: colorScheme.onPrimary.withOpacity(0.38),
+          unselectedItemColor: colorScheme.onPrimary.withValues(alpha: 0.38),
           backgroundColor: colorScheme.primary,
         ),
       ),
diff --git a/examples/layout/gallery/lib/cards_demo.dart b/examples/layout/gallery/lib/cards_demo.dart
index 848b9446102..d0662bcf1ee 100644
--- a/examples/layout/gallery/lib/cards_demo.dart
+++ b/examples/layout/gallery/lib/cards_demo.dart
@@ -128,8 +128,10 @@ class TappableTravelDestinationItem extends StatelessWidget {
                 shape: shape,
                 child: InkWell(
                   onTap: () {},
-                  splashColor:
-                      Theme.of(context).colorScheme.onSurface.withOpacity(0.12),
+                  splashColor: Theme.of(context)
+                      .colorScheme
+                      .onSurface
+                      .withValues(alpha: 0.12),
                   highlightColor: Colors.transparent,
                   child: Semantics(
                     label: destination.title,
@@ -187,13 +189,13 @@ class SelectableTravelDestinationItem extends StatelessWidget {
                   onLongPress: () {
                     onSelected();
                   },
-                  splashColor: colorScheme.onSurface.withOpacity(0.12),
+                  splashColor: colorScheme.onSurface.withValues(alpha: 0.12),
                   highlightColor: Colors.transparent,
                   child: Stack(
                     children: [
                       Container(
                         color: isSelected
-                            ? colorScheme.primary.withOpacity(0.08)
+                            ? colorScheme.primary.withValues(alpha: 0.08)
                             : Colors.transparent,
                       ),
                       Semantics(
diff --git a/examples/layout/gallery/lib/colors_demo.dart b/examples/layout/gallery/lib/colors_demo.dart
index a10cce7626a..50f8e9bc7d5 100644
--- a/examples/layout/gallery/lib/colors_demo.dart
+++ b/examples/layout/gallery/lib/colors_demo.dart
@@ -145,9 +145,6 @@ class _ColorItem extends StatelessWidget {
   final Color color;
   final String prefix;
 
-  String get _colorString =>
-      "#${color.value.toRadixString(16).padLeft(8, '0').toUpperCase()}";
-
   @override
   Widget build(BuildContext context) {
     return Semantics(
@@ -161,19 +158,33 @@ class _ColorItem extends StatelessWidget {
           crossAxisAlignment: CrossAxisAlignment.center,
           children: [
             Text('$prefix$index'),
-            Flexible(child: Text(_colorString)),
+            Flexible(child: Text(_argbColorString)),
           ],
         ),
       ),
     );
   }
+
+  static String _srgbComponentToHexString(double x) {
+    final value = (x * 255.0).round() & 0xff;
+    return value.toRadixString(16).toUpperCase();
+  }
+
+  String get _argbColorString {
+    final a = _srgbComponentToHexString(color.a);
+    final r = _srgbComponentToHexString(color.r);
+    final g = _srgbComponentToHexString(color.g);
+    final b = _srgbComponentToHexString(color.b);
+    return '#$a$r$g$b';
+  }
 }
 
 class _PaletteTabView extends StatelessWidget {
   const _PaletteTabView({required this.colors});
 
   final _Palette colors;
-  static const primaryKeys = <int>[
+
+  static const List<int> primaryKeys = [
     50,
     100,
     200,
@@ -185,7 +196,7 @@ class _PaletteTabView extends StatelessWidget {
     800,
     900
   ];
-  static const accentKeys = <int>[100, 200, 400, 700];
+  static const List<int> accentKeys = [100, 200, 400, 700];
 
   @override
   Widget build(BuildContext context) {
diff --git a/examples/layout/grid_and_list/pubspec.yaml b/examples/layout/grid_and_list/pubspec.yaml
index be031f6b0bc..8235c6e6bb2 100644
--- a/examples/layout/grid_and_list/pubspec.yaml
+++ b/examples/layout/grid_and_list/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/lakes/interactive/pubspec.yaml b/examples/layout/lakes/interactive/pubspec.yaml
index 7ffeabac7b8..cc33f9535b8 100644
--- a/examples/layout/lakes/interactive/pubspec.yaml
+++ b/examples/layout/lakes/interactive/pubspec.yaml
@@ -5,7 +5,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/lakes/step2/pubspec.yaml b/examples/layout/lakes/step2/pubspec.yaml
index df64fc0872e..b7862500870 100644
--- a/examples/layout/lakes/step2/pubspec.yaml
+++ b/examples/layout/lakes/step2/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/lakes/step3/pubspec.yaml b/examples/layout/lakes/step3/pubspec.yaml
index df64fc0872e..b7862500870 100644
--- a/examples/layout/lakes/step3/pubspec.yaml
+++ b/examples/layout/lakes/step3/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/lakes/step4/pubspec.yaml b/examples/layout/lakes/step4/pubspec.yaml
index df64fc0872e..b7862500870 100644
--- a/examples/layout/lakes/step4/pubspec.yaml
+++ b/examples/layout/lakes/step4/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/lakes/step5/pubspec.yaml b/examples/layout/lakes/step5/pubspec.yaml
index 2a93b995133..a1696b6b8e9 100644
--- a/examples/layout/lakes/step5/pubspec.yaml
+++ b/examples/layout/lakes/step5/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/lakes/step6/pubspec.yaml b/examples/layout/lakes/step6/pubspec.yaml
index 2a93b995133..a1696b6b8e9 100644
--- a/examples/layout/lakes/step6/pubspec.yaml
+++ b/examples/layout/lakes/step6/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/non_material/pubspec.yaml b/examples/layout/non_material/pubspec.yaml
index 5ff2332fdf7..f40e96728ab 100644
--- a/examples/layout/non_material/pubspec.yaml
+++ b/examples/layout/non_material/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/pavlova/pubspec.yaml b/examples/layout/pavlova/pubspec.yaml
index 06c650c46d2..d3030b29213 100644
--- a/examples/layout/pavlova/pubspec.yaml
+++ b/examples/layout/pavlova/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/row_column/pubspec.yaml b/examples/layout/row_column/pubspec.yaml
index d79d5673997..b5ec7409be8 100644
--- a/examples/layout/row_column/pubspec.yaml
+++ b/examples/layout/row_column/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/layout/sizing/pubspec.yaml b/examples/layout/sizing/pubspec.yaml
index d79d5673997..b5ec7409be8 100644
--- a/examples/layout/sizing/pubspec.yaml
+++ b/examples/layout/sizing/pubspec.yaml
@@ -4,7 +4,7 @@ description: >-
 version: 1.0.0
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/perf/concurrency/isolates/pubspec.yaml b/examples/perf/concurrency/isolates/pubspec.yaml
index d1d19e20f15..bba956fa424 100644
--- a/examples/perf/concurrency/isolates/pubspec.yaml
+++ b/examples/perf/concurrency/isolates/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/perf/deferred_components/pubspec.yaml b/examples/perf/deferred_components/pubspec.yaml
index 0c0a92c3e0a..b13b4f09b89 100644
--- a/examples/perf/deferred_components/pubspec.yaml
+++ b/examples/perf/deferred_components/pubspec.yaml
@@ -3,7 +3,7 @@ description: Samples to showcase deferred component imports/loading.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/platform_integration/compose_activities/pubspec.yaml b/examples/platform_integration/compose_activities/pubspec.yaml
index a764cee8e4e..3fdc6475711 100644
--- a/examples/platform_integration/compose_activities/pubspec.yaml
+++ b/examples/platform_integration/compose_activities/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/platform_integration/pigeon/pubspec.yaml b/examples/platform_integration/pigeon/pubspec.yaml
index 901a088b44c..304230d714f 100644
--- a/examples/platform_integration/pigeon/pubspec.yaml
+++ b/examples/platform_integration/pigeon/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/platform_integration/platform_channels/pubspec.yaml b/examples/platform_integration/platform_channels/pubspec.yaml
index 39bc9bf11aa..c90319caa2b 100644
--- a/examples/platform_integration/platform_channels/pubspec.yaml
+++ b/examples/platform_integration/platform_channels/pubspec.yaml
@@ -8,7 +8,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/platform_integration/platform_views/pubspec.yaml b/examples/platform_integration/platform_views/pubspec.yaml
index 7be53eee38a..19de5b188b4 100644
--- a/examples/platform_integration/platform_views/pubspec.yaml
+++ b/examples/platform_integration/platform_views/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/platform_integration/plugin_api_migration/pubspec.yaml b/examples/platform_integration/plugin_api_migration/pubspec.yaml
index 55bb46592cd..3cedf44118c 100644
--- a/examples/platform_integration/plugin_api_migration/pubspec.yaml
+++ b/examples/platform_integration/plugin_api_migration/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/resources/architectural_overview/pubspec.yaml b/examples/resources/architectural_overview/pubspec.yaml
index ccd0f14e907..b0fabe870e6 100644
--- a/examples/resources/architectural_overview/pubspec.yaml
+++ b/examples/resources/architectural_overview/pubspec.yaml
@@ -3,7 +3,7 @@ description: Samples for the Flutter architectural overview.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/resources/dart_swift_concurrency/pubspec.yaml b/examples/resources/dart_swift_concurrency/pubspec.yaml
index c9e17aa21e1..952c4894d6f 100644
--- a/examples/resources/dart_swift_concurrency/pubspec.yaml
+++ b/examples/resources/dart_swift_concurrency/pubspec.yaml
@@ -3,7 +3,7 @@ description: Examples for the Flutter concurrency for Swift developers article.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/state_mgmt/simple/pubspec.yaml b/examples/state_mgmt/simple/pubspec.yaml
index 9600c56be71..3031be468f9 100644
--- a/examples/state_mgmt/simple/pubspec.yaml
+++ b/examples/state_mgmt/simple/pubspec.yaml
@@ -3,7 +3,7 @@ description: Sample state management code.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/testing/code_debugging/pubspec.yaml b/examples/testing/code_debugging/pubspec.yaml
index 9b2c8ebabfe..fcf802cf65f 100644
--- a/examples/testing/code_debugging/pubspec.yaml
+++ b/examples/testing/code_debugging/pubspec.yaml
@@ -3,7 +3,7 @@ description: Examples to illustrate debugging your Flutter code.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/testing/common_errors/pubspec.yaml b/examples/testing/common_errors/pubspec.yaml
index 1bd7a8ec89f..ab53ce38222 100644
--- a/examples/testing/common_errors/pubspec.yaml
+++ b/examples/testing/common_errors/pubspec.yaml
@@ -3,7 +3,7 @@ description: Excerpts for common Flutter errors.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/testing/errors/pubspec.yaml b/examples/testing/errors/pubspec.yaml
index 8561d8d3a85..e8d0bdb860a 100644
--- a/examples/testing/errors/pubspec.yaml
+++ b/examples/testing/errors/pubspec.yaml
@@ -3,7 +3,7 @@ description: An error handling example.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/testing/integration_tests/how_to/pubspec.yaml b/examples/testing/integration_tests/how_to/pubspec.yaml
index f5ff8e9ed7f..82bee526e88 100644
--- a/examples/testing/integration_tests/how_to/pubspec.yaml
+++ b/examples/testing/integration_tests/how_to/pubspec.yaml
@@ -3,7 +3,7 @@ description: An example of setting up an integration test.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/testing/native_debugging/pubspec.yaml b/examples/testing/native_debugging/pubspec.yaml
index f7d992137ae..73fbd0890b4 100644
--- a/examples/testing/native_debugging/pubspec.yaml
+++ b/examples/testing/native_debugging/pubspec.yaml
@@ -1,11 +1,11 @@
 name: native_debugging
 description: Demonstration of native code debugging
-sdk: ^3.5.0
+sdk: ^3.6.0
 
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/tools/pubspec.yaml b/examples/tools/pubspec.yaml
index c45d9376e71..eeacac8beef 100644
--- a/examples/tools/pubspec.yaml
+++ b/examples/tools/pubspec.yaml
@@ -6,7 +6,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/ui/adaptive_app_demos/lib/pages/adaptive_grid_page.dart b/examples/ui/adaptive_app_demos/lib/pages/adaptive_grid_page.dart
index 3a66d465067..2f0b77464e7 100644
--- a/examples/ui/adaptive_app_demos/lib/pages/adaptive_grid_page.dart
+++ b/examples/ui/adaptive_app_demos/lib/pages/adaptive_grid_page.dart
@@ -107,7 +107,7 @@ class _GridItem extends StatelessWidget {
         onPressed: () => onPressed.call(index),
         child: Stack(children: [
           const Center(child: FlutterLogo(size: 64)),
-          Container(color: Colors.grey.withOpacity(isSelected ? .5 : .7)),
+          Container(color: Colors.grey.withValues(alpha: isSelected ? .5 : .7)),
           Align(
               alignment: Alignment.bottomCenter,
               child: Container(
diff --git a/examples/ui/adaptive_app_demos/pubspec.yaml b/examples/ui/adaptive_app_demos/pubspec.yaml
index 69e8cdd7d1c..329f1bc73b0 100644
--- a/examples/ui/adaptive_app_demos/pubspec.yaml
+++ b/examples/ui/adaptive_app_demos/pubspec.yaml
@@ -3,7 +3,7 @@ description: Demo code for adaptive app development techniques.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/ui/advanced/actions_and_shortcuts/pubspec.yaml b/examples/ui/advanced/actions_and_shortcuts/pubspec.yaml
index 93bdc07c3a5..b58d5dbe70a 100644
--- a/examples/ui/advanced/actions_and_shortcuts/pubspec.yaml
+++ b/examples/ui/advanced/actions_and_shortcuts/pubspec.yaml
@@ -3,7 +3,7 @@ description: Sample actions and shortcuts code.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/ui/advanced/focus/pubspec.yaml b/examples/ui/advanced/focus/pubspec.yaml
index c607bb553c7..3ec40d5db05 100644
--- a/examples/ui/advanced/focus/pubspec.yaml
+++ b/examples/ui/advanced/focus/pubspec.yaml
@@ -3,7 +3,7 @@ description: Sample focus system code.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/ui/assets_and_images/pubspec.yaml b/examples/ui/assets_and_images/pubspec.yaml
index 57e234ede07..f920b64f080 100644
--- a/examples/ui/assets_and_images/pubspec.yaml
+++ b/examples/ui/assets_and_images/pubspec.yaml
@@ -3,7 +3,7 @@ description: An example project showing how to declare and load assets.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/ui/interactive/pubspec.yaml b/examples/ui/interactive/pubspec.yaml
index 83c79b60f12..b5a3e38332d 100644
--- a/examples/ui/interactive/pubspec.yaml
+++ b/examples/ui/interactive/pubspec.yaml
@@ -2,7 +2,7 @@ name: interactive
 description: Sample code for interactive.md
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/ui/widgets_intro/pubspec.yaml b/examples/ui/widgets_intro/pubspec.yaml
index afc3b40e76c..a5ac3726bb9 100644
--- a/examples/ui/widgets_intro/pubspec.yaml
+++ b/examples/ui/widgets_intro/pubspec.yaml
@@ -3,7 +3,7 @@ description: Sample state management code.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/examples/visual_debugging/pubspec.yaml b/examples/visual_debugging/pubspec.yaml
index 15b8196f2bf..55c2eaec2ce 100644
--- a/examples/visual_debugging/pubspec.yaml
+++ b/examples/visual_debugging/pubspec.yaml
@@ -3,7 +3,7 @@ publish_to: none
 description: Examples of visual debugging.
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/pubspec.yaml b/pubspec.yaml
index cd386b0758d..5ab1ae96f92 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -2,7 +2,7 @@ name: docs_flutter_dev
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dev_dependencies:
   flutter_site:
diff --git a/src/_data/site.yml b/src/_data/site.yml
index 64dcfb84722..d6278332e74 100644
--- a/src/_data/site.yml
+++ b/src/_data/site.yml
@@ -91,7 +91,7 @@ targetmin:
 ## Software current versions
 
 appnow:
-  flutter: '3.24.5'
+  flutter: '3.27.0'
   vscode: '1.95'
   android_studio: '2024.2'
   android_sdk: '35.0.1'
diff --git a/src/content/cookbook/effects/download-button.md b/src/content/cookbook/effects/download-button.md
index 6c09199359c..18c1bdc5de5 100644
--- a/src/content/cookbook/effects/download-button.md
+++ b/src/content/cookbook/effects/download-button.md
@@ -176,15 +176,16 @@ class ButtonShapeWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    var shape = const ShapeDecoration(
-      shape: StadiumBorder(),
-      color: CupertinoColors.lightBackgroundGray,
-    );
-
+    final ShapeDecoration shape;
     if (isDownloading || isFetching) {
-      shape = ShapeDecoration(
-        shape: const CircleBorder(),
-        color: Colors.white.withOpacity(0),
+      shape = const ShapeDecoration(
+        shape: CircleBorder(),
+        color: Colors.transparent,
+      );
+    } else {
+      shape = const ShapeDecoration(
+        shape: StadiumBorder(),
+        color: CupertinoColors.lightBackgroundGray,
       );
     }
 
@@ -242,15 +243,16 @@ class ButtonShapeWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    var shape = const ShapeDecoration(
-      shape: StadiumBorder(),
-      color: CupertinoColors.lightBackgroundGray,
-    );
-
+    final ShapeDecoration shape;
     if (isDownloading || isFetching) {
-      shape = ShapeDecoration(
-        shape: const CircleBorder(),
-        color: Colors.white.withOpacity(0),
+      shape = const ShapeDecoration(
+        shape: CircleBorder(),
+        color: Colors.transparent,
+      );
+    } else {
+      shape = const ShapeDecoration(
+        shape: StadiumBorder(),
+        color: CupertinoColors.lightBackgroundGray,
       );
     }
 
@@ -803,15 +805,16 @@ class ButtonShapeWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    var shape = const ShapeDecoration(
-      shape: StadiumBorder(),
-      color: CupertinoColors.lightBackgroundGray,
-    );
-
+    final ShapeDecoration shape;
     if (isDownloading || isFetching) {
-      shape = ShapeDecoration(
-        shape: const CircleBorder(),
-        color: Colors.white.withOpacity(0),
+      shape = const ShapeDecoration(
+        shape: CircleBorder(),
+        color: Colors.transparent,
+      );
+    } else {
+      shape = const ShapeDecoration(
+        shape: StadiumBorder(),
+        color: CupertinoColors.lightBackgroundGray,
       );
     }
 
@@ -864,7 +867,7 @@ class ProgressIndicatorWidget extends StatelessWidget {
           return CircularProgressIndicator(
             backgroundColor: isDownloading
                 ? CupertinoColors.lightBackgroundGray
-                : Colors.white.withOpacity(0),
+                : Colors.transparent,
             valueColor: AlwaysStoppedAnimation(isFetching
                 ? CupertinoColors.lightBackgroundGray
                 : CupertinoColors.activeBlue),
diff --git a/src/content/cookbook/effects/parallax-scrolling.md b/src/content/cookbook/effects/parallax-scrolling.md
index 6ed1f424646..1a024947293 100644
--- a/src/content/cookbook/effects/parallax-scrolling.md
+++ b/src/content/cookbook/effects/parallax-scrolling.md
@@ -117,7 +117,7 @@ class LocationListItem extends StatelessWidget {
       child: DecoratedBox(
         decoration: BoxDecoration(
           gradient: LinearGradient(
-            colors: [Colors.transparent, Colors.black.withOpacity(0.7)],
+            colors: [Colors.transparent, Colors.black.withValues(alpha: 0.7)],
             begin: Alignment.topCenter,
             end: Alignment.bottomCenter,
             stops: const [0.6, 0.95],
@@ -673,7 +673,7 @@ class LocationListItem extends StatelessWidget {
       child: DecoratedBox(
         decoration: BoxDecoration(
           gradient: LinearGradient(
-            colors: [Colors.transparent, Colors.black.withOpacity(0.7)],
+            colors: [Colors.transparent, Colors.black.withValues(alpha: 0.7)],
             begin: Alignment.topCenter,
             end: Alignment.bottomCenter,
             stops: const [0.6, 0.95],
diff --git a/src/content/get-started/codelab-web.md b/src/content/get-started/codelab-web.md
index b29adcdbe93..21fbc8c487c 100644
--- a/src/content/get-started/codelab-web.md
+++ b/src/content/get-started/codelab-web.md
@@ -830,7 +830,7 @@ class _AnimatedProgressIndicatorState extends State<AnimatedProgressIndicator>
       builder: (context, child) => LinearProgressIndicator(
         value: _curveAnimation.value,
         valueColor: _colorAnimation,
-        backgroundColor: _colorAnimation.value?.withOpacity(0.4),
+        backgroundColor: _colorAnimation.value?.withValues(alpha: 0.4),
       ),
     );
   }
@@ -1080,7 +1080,7 @@ class _AnimatedProgressIndicatorState extends State<AnimatedProgressIndicator>
       builder: (context, child) => LinearProgressIndicator(
         value: _curveAnimation.value,
         valueColor: _colorAnimation,
-        backgroundColor: _colorAnimation.value?.withOpacity(0.4),
+        backgroundColor: _colorAnimation.value?.withValues(alpha: 0.4),
       ),
     );
   }
diff --git a/src/content/release/breaking-changes/buttons.md b/src/content/release/breaking-changes/buttons.md
index 56be77110be..18d47ced35c 100644
--- a/src/content/release/breaking-changes/buttons.md
+++ b/src/content/release/breaking-changes/buttons.md
@@ -103,10 +103,10 @@ TextButton(
     overlayColor: MaterialStateProperty.resolveWith<Color?>(
       (Set<MaterialState> states) {
         if (states.contains(MaterialState.hovered))
-          return Colors.blue.withOpacity(0.04);
+          return Colors.blue.withValues(alpha: 0.04);
         if (states.contains(MaterialState.focused) ||
             states.contains(MaterialState.pressed))
-          return Colors.blue.withOpacity(0.12);
+          return Colors.blue.withValues(alpha: 0.12);
         return null; // Defer to the widget's default.
       },
     ),
@@ -455,8 +455,8 @@ can just use the `styleFrom` method to override the disabled colors:
 
 ```dart
 RaisedButton(
-  disabledColor: Colors.red.withOpacity(0.12),
-  disabledTextColor: Colors.red.withOpacity(0.38),
+  disabledColor: Colors.red.withValues(alpha: 0.12),
+  disabledTextColor: Colors.red.withValues(alpha: 0.38),
   onPressed: null,
   child: Text('RaisedButton with custom disabled colors'),
 ),
diff --git a/src/content/tools/pubspec.md b/src/content/tools/pubspec.md
index fba92b946b8..70c1e99323a 100644
--- a/src/content/tools/pubspec.md
+++ b/src/content/tools/pubspec.md
@@ -64,7 +64,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   [!flutter:!]       # Required for every Flutter project
diff --git a/src/content/ui/animations/hero-animations.md b/src/content/ui/animations/hero-animations.md
index 7420da9c05b..3b146b5d7fc 100644
--- a/src/content/ui/animations/hero-animations.md
+++ b/src/content/ui/animations/hero-animations.md
@@ -514,7 +514,7 @@ class Photo extends StatelessWidget {
   Widget build(BuildContext context) {
     return [!Material(!]
       // Slightly opaque color appears where the image has transparency.
-      [!color: Theme.of(context).primaryColor.withOpacity(0.25),!]
+      [!color: Theme.of(context).primaryColor.withValues(alpha: 0.25),!]
       child: [!InkWell(!]
         onTap: [!onTap,!]
         child: [!Image.asset(!]
diff --git a/src/content/ui/animations/staggered-animations.md b/src/content/ui/animations/staggered-animations.md
index c66e7e7da22..07afb0b8ec4 100644
--- a/src/content/ui/animations/staggered-animations.md
+++ b/src/content/ui/animations/staggered-animations.md
@@ -325,9 +325,9 @@ class _StaggerDemoState extends State<StaggerDemo>
             width: 300,
             height: 300,
             decoration: BoxDecoration(
-              color: Colors.black.withOpacity(0.1),
+              color: Colors.black.withValues(alpha: 0.1),
               border: Border.all(
-                color:  Colors.black.withOpacity(0.5),
+                color: Colors.black.withValues(alpha: 0.5),
               ),
             ),
             child: StaggerAnimation(controller:_controller.view),
diff --git a/tool/flutter_site/pubspec.yaml b/tool/flutter_site/pubspec.yaml
index be85d9e1d3a..7486fd16fc0 100644
--- a/tool/flutter_site/pubspec.yaml
+++ b/tool/flutter_site/pubspec.yaml
@@ -3,7 +3,7 @@ description: Dart-based tools for building docs.flutter.dev.
 publish_to: none
 
 environment:
-  sdk: ^3.5.0
+  sdk: ^3.6.0
 
 dependencies:
   args: ^2.4.2