Worked on the dart-lang/tools repository to deliver a Dart code formatting compatibility update focused on future-proofing the codebase for upcoming changes in the dart_style package. The work involved updating code_builder to require the latest Dart language version when formatting code and making the language_version parameter mandatory across all relevant code paths. This required careful dependency management, updates to CI/CD configurations, and refreshing example code to ensure consistency with the new requirements. Using Dart and YAML, the developer ensured that formatting tooling remains robust and compatible, addressing evolving language standards and maintaining a smooth development workflow for future releases.