interface
Question type: Field-and-Force Entry: Sea-State Fields, Gradient Settlement, and Four-Force Unification. Canonical lane: start at V04-4.3 (Force = Gradient Settlement: The Energy Sea Has No Up, Down, Left, or Right — Only Slopes). Bridge if needed: V01-1.17, V04-4.20. Default retrieval profile: explain_profile. Forbidden shortcut: Do not route field/force questions into public metaphors before the Sea-State map and Gradient Settlement are fixed.