Unable to flatten a model using the flattenAndRemoveMixins transform with AST

[mullermp]

Given smithy-build.json

{
  "version": "1.0",
  "projections": {
    "source": {
      "transforms": [
        {
          "name": "flattenAndRemoveMixins"
        }
      ]
    }
  }
}

And a vanilla mixin model as model.smithy:

$version: "2"

namespace smithy.ruby.tests

@mixin
structure UserIdentifiersMixin {
    id: String
}

structure UserDetails with [UserIdentifiersMixin] {
    alias: String
}

I'm not able to get a flattened version using smithy ast -c smithy-build.json model.smithy

[mullermp]

@kstich if you don't mind since you added this.

[mullermp]

I'm aware of the --flatten option but the config file should be respected if it's passed into the ast command.

[kstich]

This should be resolved when #2552 ships.

[mullermp]

Thanks. Tangentially, if you were able to fix config support for the AST command for mixins, could you do it for prelude as well? #2500 (comment)