A useful prompt names the person, the job they need done and the point where the journey is complete.

Add the screens, information and business rules the first version must respect.

Tell Grafter what to preserve before asking for a revision, so a hero change does not rewrite the whole app.

Use Plan when the request is still fuzzy; use Build when the outcome and boundaries are clear.

Read the preview, then ask for the smallest change that fixes the next visible problem.