I too recently discovered this workflow and I'm blown by it. The key IMHO is first to give claude as low requirements as possible and let it's plan mode roam freely. Writing a reporting for sales metrics? "Ultrathink relevant sales metrics" and it will give you a lot to start ranking which you want, maybe add some that are missing. Then create a new directory for this feature and ask it to write the plan to a file. Then proceed to create an implementation plan, ask it to find all the relevant data from the database and write how to query it. Then finally let it implement it and write tests and end user documentation. And send it to QA.
Need sales forecasting? This used to be an enterprise feature that 10 years ago would have needed a large team to implement correctly. Claude implements a docker container in one afternoon.
It really changes how I see software now. Before there were NDAs and intellectual property and companies too great care not to leak their source code.
Now things have changed, have a complex ERP system that took 20 years to develop? Well, claude can re-implement it in a flash. And write documentation and tests for it. Maybe it doesn't work quite that well yet, but things are moving fast.