I think you’re on the money with the problem of maintaining (another) source of truth.

Speaking from personal experience, I still find myself reaching for Whiteboard. It’s helpful when it’s critical for me as a developer to understand the implementation, which is certainly not every change!

In the future, we want to deliver a hosted product that addresses the N+1 concern you raised. The problem with the existing tools is that plans don’t stay up to date with what the agent decided to implement, and the back-and-forth that happens after the initial prompt isn’t captured. We believe a single whiteboard canvas can be used to capture not only a plan at design time, but what happens after.