Draw 12 steampunk upper-body garments for a skeleton as separate 1024x1024 RGBA PNG layers stacked on top of the attached base. Character is FRONT-FACING and centered at x=512; the skull spans x=300..725, y=430..848, jaw bottom at (512,848), jaw sides at about (380,790) and (645,790). Match the base exactly: painterly gritty texture, dark brown outlines, palette of worn black/brown leather, teal cloth, aged brass and teal gems.

Placement: the garment must fully cover the existing coat silhouette so none of it shows through. Shoulder line runs from (0,945) up to (140,885) and (880,885) to (1024,945); the coat lapel tips reach up to y=755 at x=215..335 and x=690..810, so cover those too. Everything is opaque down to the bottom edge y=1024 across x=0..1024.

The neck opening is centered at x=512, spans x=370..655, top edge at y=800, and no pixels may sit above the jaw contour; the skull must stay fully visible.

Variants: 4 baggy jumpers (chunky knit, brass-buttoned shawl collar, gear-patterned knit, ribbed with leather elbow straps); 4 baggy hoodies with the hood DOWN, bunched around the neck and shoulders below y=800 (brass grommets, toggle drawstrings, riveted pocket, patched canvas); 4 baggy open shirts (billowy linen, unbuttoned with brass collar pins, rolled sleeves). Each open shirt shows a dark undershirt or the brass gorget at x=440..585, y=840..1024, painted into this layer.

Only garment pixels; everything else fully transparent. Write artifacts/jumper_01.png .. artifacts/jumper_12.png and artifacts/jumper.json: an array of {"file","name","weight"} with integer weights summing to 100; plain knits are common (about 12 each) and gear-embellished/gem variants are rare (about 4 each). Write artifacts/jumper_01.png .. artifacts/jumper_12.png and artifacts/jumper.json: an array of {"file","name","weight"} with weights summing to 100, rarer lower.