Am I correct in my findings that the Automation API currently does not support stack transformations? Such as the ones mentioned here: https://www.pulumi.com/blog/automatically-enforcing-aws-resource-tagging-policies/#automatically-applying-tags.

@lemon-lamp-41193 no, this should work? it happens at the program level

By that you mean I need to register the transformation within the actual pulumi program code (not within the surrounding project)?