How can you add steps to a workflow execution later?

I’d like to be able to implement just 1-2 workflows at a time.

What’s the best way to build it so that I can add steps to the workflow, and they’ll automatically execute from the previous run when I update the code and implement.

Was thinking of always having a failing subworkflow at the end, so the main workflow will never be considered complete.

That way I could always add steps.

Is there a better way to do this?