Lesson 3: The modern default stack, measured one switch at a time
24 min read·13 Oct 2026
Module 7 · Lesson 3 · About 60 minutes · Needs: Lesson 2 of this module (the 2017 preset,diff); Module 6, Lesson 3 (ablation methodology,verdict)
The situation
Sol 418 at Aurora Station. Lesson 2 showed that base is the 2017 transformer with five switches replaced. Kofi Mensah is not satisfied: "Five replacements, and we copied all of them. Which ones earn their place on our corpus? One change at a time, matched weights, seeds."
This lesson walks from the 2017 design to base one measured switch at a time, then varies the shape at a fixed weight count. The running example is the 2017 preset at base's size, followed until it becomes base.