effective_dart packaged the official Effective Dart
style guidelines as a ready-to-use analyzer configuration. Instead of hand-picking dozens of lint rules, projects could add a single dev dependency and follow the canonical Dart style.
Legacy#
The package served the community until the Dart team shipped the official lints package, which now fills the same role.
effective_dart is retired, but it remains a project I'm proud of — it helped thousands of projects write more consistent Dart while the official tooling caught up.