flutter-upgrade-sdk

name	flutter-upgrade-sdk
description	> Use when this capability is needed.

Flutter SDK Upgrade Protocol

Follow this procedure when upgrading the Flutter and Dart SDK versions used in this monorepo. Ensuring all configurations, packages, and CI pipelines stay in sync is critical for monorepo health.

1. Upgrade FVM (Flutter Version Management)

FVM is the source of truth for the local development environment. fvm flutter --version will automatically update the fvm managed local flutter to the correct version if it is not already installed.

You can manually update flutter versions by running:

• Run fvm install <new-flutter-version> (e.g., fvm install 3.41.2) in the root of the repository if the new target version of flutter is not already installed.
• Run fvm use <new-flutter-version> (e.g., fvm use 3.41.2) in the root of the repository.
• Verify that .fvm/fvm_config.json has been updated with the new version.

2. Update CI/CD Workflows

The GitHub Actions workflows must use the exact same Flutter version as FVM to prevent CI drifts.

• Open .github/workflows/test.yml.
• Locate the subosito/flutter-action step.
• Update the flutter-version: parameter to match the new FVM version exactly.

3. Update Package pubspec.yaml Files

All packages in the monorepo should share the same minimum Dart/Flutter SDK requirements.

• Locate all pubspec.yaml files across the repository. This includes:

  • packages/flutter_adaptive_cards_fs/pubspec.yaml
  • packages/flutter_adaptive_charts_fs/pubspec.yaml
  • packages/flutter_adaptive_template_fs/pubspec.yaml
  • adaptive_explorer/pubspec.yaml
  • widgetbook/pubspec.yaml

• Update the environment: constraints to match the new minimum Dart SDK (and optionally Flutter SDK) corresponding to the new Flutter version.

  environment:
    sdk: ^<new-dart-version>
  

4. Update Changelogs

Document the SDK bump so consumers of the packages are aware of the new minimum requirements.

• Add a bullet point to the CHANGELOG.md file for every updated package under the Unreleased or upcoming version heading.
• Example: - Require Dart SDK <new-dart-version> and Flutter <new-flutter-version>

5. Verify the Upgrade

Ensure that the new SDK version does not break existing code or cause new linting errors.

• Ensure dependencies are resolved (using fvm flutter pub get or upgrade at the workspace root).
• Run fvm flutter analyze to catch any new static analysis errors or deprecations introduced by the newer SDK.
• Run fvm flutter test to ensure all tests continue to pass.
• Fix any deprecations or breaking changes introduced by the new Flutter/Dart version before committing.

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Source: freemansoft/Flutter-AdaptiveCards — distributed by TomeVault.