Hey @<1523701083040387072:profile|UnevenDolphin73> what you're building here sounds like a useful tool. Let me understand what you're trying to achieve here, please correct me if I'm wrong:

• You want to create a set of Step classes with which you can define pipelines, that will be executed either locally or remotely.
• The pipeline execution is triggered from a notebook.
• The steps are predefined transformations, the user normally won't have to create their own steps
  Did I get all of this right?

As for your two questions

1. the pipeline controller expects either functions ( .add_function_step or via @PipelineDecorator.component ) or already executed tasks ( .add_step ), not classes.
2. You can ofc edit the steps, but by running the pipeline you will recreate it. Maybe it will help if you define what does "recreating a pipeline" mean to you and why is it a problem