This was an attempt at creating a workflow that better integration code generation into flutter run. Nevertheless, there were a number of failures and issues that were unsolvable:

• Maintaining build_runner integration code was trickier than expected, due to the large API surface
• Surfacing errors in an actionable way was hard when so much of the functionality relied on autogenerated code
• Further complications from null safety means than generate + check-in workflows might be more compelling, due to the need to closely control build_runner versions.

Because of this, we've decided to deprecate and remove the functionality and recommend that users use dart pub run build_runner instead.