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randalschwartz/dart-sdk-skills · Archived

flutter-sdk-changelog

>- Expert guide and lookup reference for Flutter framework versions, widget deprecations, API replacements, Material 3 migrations, and the unbundling of standalone material_ui and cupertino_ui packages from Flutter 1.0 to modern Flutter (3.44+ / 3.47+). Use this skill whenever the user asks "what's new in Flutter X", "what's new in 3.47", "what's new in 3.44", "what's new in 3.24", "what's new in 3.22", asks how to fix deprecated Flutter widgets (WillPopScope, withOpacity, MaterialState, FlatBu…

First seen Aug 22, 2026

Installation

$ npx skills add randalschwartz/dart-sdk-skills --skill flutter-sdk-changelog
View on skills.sh ↗ GitHub repository ↗

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Repository health

Stars 27
License LICENSE
Default branch main
Open issues 0
Status Archived

Package contents

Files included with this skill beyond the listing page.

  • skill md SKILL.md 8,311 B
  • docs SUMMARY.md 764 B

History

  1. First seen on skills.sh
  2. First recorded snapshot · 48 installs

SKILL.md

Flutter SDK Changelog & Widget Migration Guide (Flutter 1.0 to Modern Flutter)

This skill provides an authoritative, structured reference for Flutter framework releases, widget deprecations, API replacements, Material 3 design migrations, the decoupling of standalone materialui and cupertinoui packages, and legacy Flutter codebase rescue runbooks.

🎯 Fast Flutter Widget & API Replacement Matrix

Deprecated / Obsolete API Introduced / Deprecated In Modern Replacement Reference
Color.withOpacity(o) Deprecated in Flutter 3.22 Color.withValues(alpha: o) [Widget Deprecations](references/widget-deprecations-and-replacements.md)
MaterialState / MaterialStateProperty Deprecated in Flutter 3.22 WidgetState / WidgetStateProperty [Widget Deprecations](references/widget-deprecations-and-replacements.md)
WillPopScope Deprecated in Flutter 3.12+ PopScope(canPop: ..., onPopInvokedWithResult: ...) [Widget Deprecations](references/widget-deprecations-and-replacements.md)
FlatButton, RaisedButton, OutlineButton Deprecated in Flutter 2.0 TextButton, ElevatedButton, OutlinedButton [Widget Deprecations](references/widget-deprecations-and-replacements.md)
TextTheme.headline1...6, bodyText1/2 Deprecated in Flutter 3.7+ displayLarge...small, bodyLarge/Medium [Widget Deprecations](references/widget-deprecations-and-replacements.md)
ThemeData.accentColor Deprecated in Flutter 2.5+ ColorScheme.secondary [Widget Deprecations](references/widget-deprecations-and-replacements.md)
Scaffold.of(context).showSnackBar() Deprecated in Flutter 2.0 ScaffoldMessenger.of(context).showSnackBar() [Widget Deprecations](references/widget-deprecations-and-replacements.md)
package:flutter/material.dart Monolithic Flutter SDK package:materialui/materialui.dart [Material & Cupertino Migration](references/material-ui-and-cupertino-ui-migration.md)
package:flutter/cupertino.dart Monolithic Flutter SDK package:cupertinoui/cupertinoui.dart [Material & Cupertino Migration](references/material-ui-and-cupertino-ui-migration.md)
BottomNavigationBar Legacy M2 Navigation NavigationBar (Material 3) [Material 3 Guide](references/material-2-to-material-3-guide.md)
ToggleButtons Legacy M2 Toggle SegmentedButton<T> (Material 3) [Material 3 Guide](references/material-2-to-material-3-guide.md)
PopupMenuButton Legacy popup menu MenuAnchor / SubmenuButton [Material 3 Guide](references/material-2-to-material-3-guide.md)

⚡ Subskill Spotlights

Subskill: Standalone materialui & cupertinoui Package Migration

  • Decoupled Architecture: Transition from monolithic framework design libraries to standalone pub packages with independent release cadences.
  • Automated Fix: Run dart fix --apply --code=migratedesignwidgets to update imports and dependencies automatically.
  • Headless Core Support: Construct purely custom design systems directly against package:flutter/widgets.dart.

👉 Read the full [Material & Cupertino UI Migration Guide](references/material-ui-and-cupertino-ui-migration.md).

Subskill: Widget Deprecations & Modernization

  • Predictive Back Navigation: Replace WillPopScope with PopScope for zero-stutter predictive back gestures on Android 14+ and iOS.
  • Wide-Gamut Colors: Replace withOpacity with withValues(alpha: ...) to eliminate 8-bit precision loss and color clipping.
  • Unified State Management: Replace MaterialState with universal WidgetState.

👉 Read the full [Widget Deprecations & Replacements Guide](references/widget-deprecations-and-replacements.md).

Subskill: Material 2 to Material 3 Migration

  • Seed-Based Theming: Generate tonal palettes with ColorScheme.fromSeed(seedColor: ...).
  • Component Modernization: Migrate from BottomNavigationBar to NavigationBar, ToggleButtons to SegmentedButton, and M2 buttons to FilledButton.

👉 Read the full [Material 2 to Material 3 Guide](references/material-2-to-material-3-guide.md).

Subskill: Rescuing Legacy Flutter Apps (Flutter 1.x / 2.x to Modern 3.x)

  • 5-Phase Upgrade Pipeline: Baseline toolchain check &rarr; null safety bridge &rarr; widget deprecation fixes &rarr; Material 3 update &rarr; modern state & routing.

👉 Read the full [Legacy Flutter App Rescue Runbook](references/rescuing-legacy-flutter-apps.md).

📚 Table of Contents & Reference Archive

Document Focus Area Description
[material-ui-and-cupertino-ui-migration.md](references/material-ui-and-cupertino-ui-migration.md) Package Decoupling Complete runbook for migrating from SDK-bundled material/cupertino to standalone materialui and cupertinoui.
[flutter-to-dart-version-matrix.md](references/flutter-to-dart-version-matrix.md) Version Mapping Full mapping of Flutter 1.0–3.27+ to bundled Dart SDKs and engine milestones.
[widget-deprecations-and-replacements.md](references/widget-deprecations-and-replacements.md) Widget Dictionary Before/After code snippets for all deprecated Flutter widgets and properties.
[material-2-to-material-3-guide.md](references/material-2-to-material-3-guide.md) UI & Theming Comprehensive Material 3 migration guide, dynamic color schemes, and new components.
[rescuing-legacy-flutter-apps.md](references/rescuing-legacy-flutter-apps.md) Upgrade Runbook 5-phase structured runbook for stepping legacy Flutter apps to modern Flutter.

🛠️ Recommended Runbooks

1. Migrating to Standalone materialui & cupertinoui

  1. Execute dart fix --apply --code=migratedesignwidgets to rewrite imports.
  2. Confirm pubspec.yaml dependencies include materialui and cupertinoui.
  3. Consult the [Material & Cupertino UI Migration Guide](references/material-ui-and-cupertino-ui-migration.md) for localization updates and headless architectures.

2. Migrating Deprecated Widgets & Properties

  1. Identify the deprecated widget or property (for example WillPopScope, Color.withOpacity, MaterialStateProperty).
  2. Consult the [Widget Deprecations Guide](references/widget-deprecations-and-replacements.md).
  3. Replace with the modern declarative equivalent (for example PopScope, Color.withValues(alpha: ...), WidgetStateProperty).

3. Migrating to Material 3

  1. Review the [Material 2 to Material 3 Guide](references/material-2-to-material-3-guide.md).
  2. Configure ThemeData using ColorScheme.fromSeed(seedColor: ...).
  3. Replace legacy navigation bars (BottomNavigationBar &rarr; NavigationBar) and controls (ToggleButtons &rarr; SegmentedButton).

4. Upgrading / Rescuing Legacy Flutter Apps

  1. Determine current Flutter and Dart versions from pubspec.yaml environment block.
  2. Follow the 5-phase pipeline in the [Legacy Flutter App Rescue Runbook](references/rescuing-legacy-flutter-apps.md):

- Check toolchain &rarr; Sound Null Safety bridge &rarr; Widget deprecations &rarr; Material 3 theme &rarr; Modern routing & reactive state.

5. Answering "What's New in Flutter X.Y"

  1. Match the Flutter version in the [Flutter to Dart Version Matrix](references/flutter-to-dart-version-matrix.md).
  2. State the bundled Dart SDK version, major framework milestones, and engine updates.