"Copy" requests take a real benchmark pair's own annotated motion as the bag; the round trip shows how faithfully a fabricated scene can reproduce it (the labels are exact either way). "Gap-fill" requests are what the doctor actually writes: a fabricated bag aimed at deficient cells of the coverage table (a placement, a magnitude band, a direction sector, and a camera kind). The pharmacist never sees an image; it reads the vectors as keys and values, so the read is permutation-invariant, and emits six committed numbers per object. Delivered magnitude tracks the request; direction spread is realised by the camera kind.