10/10 points: Provide a valid pubspec.yaml

5/5 points: Provide a valid README.md

5/5 points: Provide a valid CHANGELOG.md

10/10 points: Use an OSI-approved license

Detected license: MIT.

10/10 points: 20% or more of the public API has dartdoc comments

826 out of 1146 API elements (72.1 %) have documentation comments.

Some symbols that are missing documentation: ascii_codec, ascii_codec.AsciiCodecMixin.asciiCodec, ascii_decoder, ascii_decoder.AsciiDecoderMixin.asciiDecoder, ascii_encoder.

10/10 points: Package has an example

0/20 points: Supports 0 of 6 possible platforms (iOS, Android, Web, Windows, macOS, Linux)

0/50 points: code has no errors, warnings, lints, or formatting issues

Found 12 issues. Showing the first 2:

   ╷
12 │ mixin DeferredLibraryMixin implements DeferredLibrary {
   │                                       ^^^^^^^^^^^^^^^
   ╵

   ╷
14 │     DeferredLibrary get deferredLibrary;
   │     ^^^^^^^^^^^^^^^
   ╵

10/10 points: All of the package dependencies are supported in the latest version

To reproduce run dart pub outdated --no-dev-dependencies --up-to-date --no-dependency-overrides.

10/10 points: Package supports latest stable Dart and Flutter SDKs

0/20 points: Compatible with dependency constraint lower bounds

downgrade analysis failed failed with 5 errors:

• IMPLEMENTS_NON_CLASS - lib/async/deferred_library.dart:12:39 - Classes and mixins can only implement other classes and mixins.
• UNDEFINED_CLASS - lib/async/deferred_library.dart:14:2 - Undefined class 'DeferredLibrary'.
• INVALID_OVERRIDE - lib/io/file.dart:20:15 - 'FileMixin.create' ('Future

Run dart pub downgrade and then dart analyze to reproduce the above problem.

You may run dart pub upgrade --tighten to update your dependency constraints, see dart.dev/go/downgrade-testing for details.