Cut the serve down to three poses

Oliver, after playing the four-stage version on the phone: idle, then the racket
dropping on the pull, then the drive on release — "that's all, forget all the
others". At thumb speed the middle stages are never read, so they are deleted
rather than kept around: p_pull is the wind-up, p_smash is the drive, and both
come out of the photo-referenced sheet, so the whole serve is one drawing style.

The dead batches and the arm_left guard go with them. assets/_pose_ref_serve.png
is kept as the recipe: his photo sequence over our own sprites, which is what
turned a fifteen-generation prose argument into one generation.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

assets/_regen_batches.json

@@ -387,50 +387,5 @@
   "anchor": 0,
   "check": "same",
   "subject": "The reference is ONE tennis player in a white shirt, blue shorts and a white headband, seen from behind, serving with the racket high in his right hand. Draw FOUR frames of that same man. Every figure is seen strictly FROM BEHIND \u2014 the back of his head and the back of his shirt towards you, NO face, NO eyes, NO nose, NO mouth. Every figure is drawn from exactly the same viewpoint: same camera height, same distance, straight on, standing on the same level ground line, with no perspective distortion, no foreshortening, no worm's-eye or bird's-eye angle and no three-quarter turn. Same size, same body, same style, same BRIGHT WHITE shirt and BRIGHT BLUE shorts as the reference \u2014 do not wash the colours out. He is RIGHT-HANDED and the racket NEVER changes hands: in every single frame the racket is in his RIGHT hand, which \u2014 because he is drawn from behind \u2014 is on the RIGHT-HAND SIDE OF THE IMAGE, exactly as in the reference. His empty left arm is on the LEFT-HAND SIDE OF THE IMAGE. Draw NO ball anywhere in any frame \u2014 the game draws the ball. Frame 1: he STANDS upright and relaxed at the baseline, arms down, the racket hanging at his right side. Frame 2: he leans forward a little and his empty LEFT hand reaches down and out to the LEFT-HAND SIDE OF THE IMAGE, palm down, as if patting a ball on the ground beside his left foot; the racket stays in his right hand at his right side. Frame 3 IS THE SAME DRAWING AS FRAME 2 \u2014 identical stance, identical legs, identical head, identical racket, identical everything \u2014 and the ONLY difference is that his left elbow is bent a little more so that left hand has risen about one hand's width higher, as if the ball had bounced back up into it. Frame 4: the ball toss \u2014 he leans back and throws that same empty LEFT arm up high above him on the LEFT-HAND SIDE OF THE IMAGE, having just released the ball, while the racket stays in his right hand down at his right side. Output exactly four figures in one row, evenly spaced and far apart."
- },
- "player_windup": {
-  "sprites": [
-   "p_pull0",
-   "p_pull1",
-   "p_pull2",
-   "p_pull3",
-   "p_pull4"
-  ],
-  "ref_only": [
-   "p_idle1",
-   "p_toss"
-  ],
-  "anchor": 0,
-  "check": "same",
-  "scale": 1.6,
-  "arm_left": true,
-  "subject": "The reference shows the same tennis player twice \u2014 white shirt, blue shorts, white headband, seen from behind: standing with the racket in his right hand, and throwing the ball up to serve with his empty left arm high on the left-hand side of the image. Draw FIVE frames of that same man. Every figure is seen strictly FROM BEHIND \u2014 the back of his head towards you, NO face, NO eyes, NO nose \u2014 all from the same camera height and distance, on the same ground line, no perspective distortion and no three-quarter turn. Same size, same body, same style, same BRIGHT WHITE shirt and BRIGHT BLUE shorts, no coloured collar or trim. Draw NO ball anywhere \u2014 the game draws the ball. He is RIGHT-HANDED and the racket NEVER changes hands: his whole right arm stays on the RIGHT-HAND SIDE OF THE IMAGE and his empty LEFT arm stays thrown up high on the LEFT-HAND SIDE OF THE IMAGE. Never mirror him.\nTHE FOUR SERVE FRAMES MUST BE STRONGLY DIFFERENT FROM ONE ANOTHER, and what changes between them is HOW FAR THE RACKET HAS FALLEN: in each frame the racket head is at a clearly lower point on his body than in the frame before, and his body leans further back. Do not draw four similar poses. In ALL FOUR his empty left arm is held up high above him and never comes down \u2014 only the racket falls.\nFrame 1: he simply STANDS upright and relaxed, arms down \u2014 a plain standing frame.\nFrame 2: the racket is held STRAIGHT UP, its head HIGH ABOVE HIS HEAD with clear sky between the racket and his hair, his right arm almost straight, his body upright, and his empty LEFT arm still thrown up high above him on the left-hand side of the image.\nFrame 3: the racket has tipped over backwards so its head now points DOWN and sits BESIDE HIS EAR, level with his face, his right elbow raised to shoulder height, his body just beginning to lean back, and his empty LEFT arm still thrown up high above him on the left-hand side of the image.\nFrame 4: the racket head has fallen to the MIDDLE OF HIS BACK, between his shoulder blades, his right elbow high above his shoulder, his back arched and leaning clearly backwards, knees beginning to bend, and his empty LEFT arm still thrown up high above him on the left-hand side of the image.\nFrame 5: the racket head has fallen all the way down to the BACK OF HIS THIGHS, below his shorts, the racket hanging almost straight down behind him; his right elbow points at the sky beside his head, his body is leaned back as far as it goes with his hips pushed forward, his heels are lifted off the ground, and his empty LEFT arm is STILL thrown up high above him on the left-hand side of the image. This is maximum tension, the instant before he explodes upwards.\nOutput exactly five figures in one row, evenly spaced and far apart."
- },
- "player_idle": {
-  "sprites": [
-   "p_idle1",
-   "p_idle2"
-  ],
-  "ref_only": [
-   "p_idle1"
-  ],
-  "anchor": 0,
-  "check": "same",
-  "scale": 1.6,
-  "subject": "The reference is ONE tennis player in a white shirt, blue shorts and a white headband, seen from behind, standing at the baseline with the racket in his right hand. Draw TWO frames of that same man waiting. Every figure is seen strictly FROM BEHIND \u2014 the back of his head and the back of his shirt towards you, NO face, NO eyes, NO nose, NO mouth. Every figure is drawn from exactly the same viewpoint: same camera height, same distance, straight on, standing on the same level ground line, with no perspective distortion, no foreshortening, no worm's-eye or bird's-eye angle and no three-quarter turn. Same size, same body, same style, same BRIGHT WHITE shirt and BRIGHT BLUE shorts as the reference \u2014 do not wash the colours out.He is RIGHT-HANDED and the racket NEVER changes hands: in every frame the racket is in his RIGHT hand, which \u2014 because he is drawn from behind \u2014 is on the RIGHT-HAND SIDE OF THE IMAGE, exactly as in the reference. His empty left arm hangs on the LEFT-HAND SIDE OF THE IMAGE. Draw NO ball anywhere. THE TWO FRAMES ARE THE SAME DRAWING: identical body, identical arms, identical racket, identical head \u2014 the ONLY difference is a small idle weight shift. Frame 1: his weight is on his left foot, that hip a little higher. Frame 2: the same man with his weight settled onto his right foot. Output exactly two figures in one row, far apart."
- },
- "player_drive": {
-  "sprites": [
-   "p_pull0",
-   "p_pull4"
-  ],
-  "ref_only": [
-   "p_idle1",
-   "p_pull3"
-  ],
-  "anchor": 0,
-  "check": "same",
-  "scale": 1.6,
-  "subject": "The reference shows the same tennis player twice \u2014 white shirt, blue shorts, white headband, seen from behind: standing with the racket in his right hand, and part-way through a serve with the racket dropping behind his back. Draw TWO frames of that same man. Both are seen strictly FROM BEHIND \u2014 the back of his head towards you, NO face, NO eyes, NO nose \u2014 from the same camera height and distance, on the same ground line, no perspective distortion and no three-quarter turn. Same size, same body, same style, same BRIGHT WHITE shirt and BRIGHT BLUE shorts, no coloured collar or trim, a plain grey-strung wooden racket. Draw NO ball anywhere. He is RIGHT-HANDED and the racket stays in his RIGHT hand. Frame 1: he simply STANDS upright and relaxed, arms down \u2014 a plain standing frame. Frame 2 is the instant of MAXIMUM TENSION just before he uncoils. He stands tall and nearly straight, not crouched and not folded over: his legs are long, his heels lifted, and his upper body leans BACKWARDS so his shoulders are behind his hips and his hips are pushed forward. His RIGHT elbow is raised beside his head and the racket hangs STRAIGHT DOWN BEHIND HIS BACK from that hand, the racket head level with his hips. His LEFT arm is folded down in front of his chest. His head is UP and clearly visible from behind with the white headband on it \u2014 his arms must not cover his head, and he must not be bent over sideways or forwards. Output exactly two figures in one row, far apart."
  }
 }