3 · Plan
Walk the prototype back into user stories a human can read, react to, and approve — then turn the approved stories into a technical plan agents build from.
This is the return trip. Spec-driven development only runs one way: human intent down into code. Products get good on the trip back up, where humans can actually react.
The CPO skills
Section titled “The CPO skills”- cpo-stories — walks the prototype and shows you a diff: what it promises versus what the card asked for — added, changed, dropped. Nothing the prototype invented gets adopted silently.
The checkpoint
Section titled “The checkpoint”Definition of ready. Your approval of the story diff is what lets any agent start building. The approved stories become the build contract and the verification checklist.
Deliverables
Section titled “Deliverables”Approved stories (the diff, blessed by you) · the technical plan.
Who participates
Section titled “Who participates”Product runs the walk; you approve; Eng turns stories into the plan.