01 / 03THE LEGACY MODEL

The legacy model, still in use today.

Four steps on every change: describe it, plan it, build it, prove it. A person on every step, one at a time.

02 / 03THE SPLIT

For the first time, AI is splitting work into judgment and production.

Every step was always both. Production is doing the work. Judgment is deciding it’s right. Until now, the same person did both, one step at a time.

03 / 03THE FACTORY

Four steps. Two people.

Agents run production, below the line. People own judgment, above it: a tech lead approves the plan before anything is built, and a lead approves the release before it ships.