I would have said that Harper Reed's workflow (brainstorm spec, then co-plan a plan, then execute using LLM codegen) is basically best practice today and I'm surprised that the author adds that "I’ve not been successful using this technique to build a complete feature or prototype."

Here's an example of using this pattern with Brokk to solve a real world bug: https://www.youtube.com/watch?v=t_7MqowT638