Draw 12 jumper variants as separate 1024x1024 RGBA PNG layers for a generative PFP of a steampunk skeleton. Match the attached base character's style, line weight and palette exactly: painterly, fine dark ink outlines, aged brass fittings, teal gems, grimy muted fabrics.

Facing: front, symmetric torso; skull centered at x=512.

Corrected geometry: the jaw bottom is at y=845, spanning x=380..645, and the jumper must never cover it.

Variants: 5 baggy knit jumpers (cable-knit, ribbed, patched, oversized roll-neck, Fair Isle with gear motifs); 4 hoodies shown with the hood down, bunched around the neck, with brass grommets, toggles and drawstrings; 3 baggy open shirts (linen or canvas) worn over a fabric undershirt so the front stays filled. Every variant needs steampunk trim such as brass buttons, rivets, leather patches, small gears or a pocket watch chain.

Placement: the garment must fully cover the base coat silhouette.

Neckline: a U-shaped opening that dips to y=850 at x=512, hugs below the jaw, and rises to y=770 at x=340 and x=684.

Shoulders: slope from about y=800 at x=300/724 down to y=930 at x=0/1024. Fill solid to the bottom edge y=1024 across x=0..1024. Cover the coat lapels, which reach y=755 near x=220 and x=800.

Fabric must be opaque, with no gaps where the black leather coat could show through. Only jumper 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, rarer variants lower (e.g. Fair Isle gear jumper and brass-zip hoodie 3-5).

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.