{
  "mode": "built-in",
  "hands": "Use case: identity-preserve. Input image is approved STYLE and hand identity reference, NOT the coin to copy. Make a production first-person RIGHT HAND AND COMPLETE BLACK LEATHER FOREARM sprite atlas for throwing TWO dice supplied separately by the game. NO DICE AND NO COINS in this image. Exact 16 poses, 4 columns by 4 rows, transparent gutters. Same adult light skin, correct five fingers, gritty detailed retro pixel-art shading, black worn leather sleeve as reference. Forearm continues to bottom-right cell edge naturally, never cut at wrist. Palm opens upward, cupped near upper-left of each cell, fingers angled away from viewer. Frames0-3: subtly shifting cupped palm, enough room in palm for two dice. Frames4-7: palm smoothly pushes forward and fingers open to release dice. Frames8-11: open forward hand follows through. Frames12-15: gradually relax fingers and retract. Same camera, scale, light and palm anchor at approximately x=40%,y=28% in every cell; hand and long sleeve fill lower-right. No objects, no scenery, no labels, no mattes, no borders, no extra rows. Crisp pixel clusters matching reference, not photorealistic. Transparent background.",
  "table": "Reuses assets/animations/coin/table-v1.bin unchanged.",
  "dice": "Reuses the original cubeCorners3D/cubeFaces3D/cubeColors3D/DrawTumblingDie3D; no generated replacement dice."
}