Draw 12 steampunk jumper variants as separate 1024x1024 RGBA PNG layers for a PFP collection, matching the base skull character's painterly style, dark line weight and palette (bone, black leather, brass, teal). Character is FRONT-FACING, centred at x=512. The layer sits on top of the base, which already wears a black leather coat with peaked lapels and a brass neck collar, so each jumper must be fully opaque over the whole torso and completely hide that coat.

Placement: torso silhouette spans x=0..1024 down to the bottom edge y=1024; top edge reaches y=740 beside the neck (x=300..360 and x=664..724) to cover the lapel peaks, then slopes to about y=870 at x=0 and x=1024 as broad baggy shoulders.

Neckline: a round or cowl opening centred at x=512 that stays BELOW the skull jaw. Leave fully transparent everything above y=845 between x=360 and x=664, and everything above y=800 between x=330 and x=694, so the chin and jaw stay visible. No pixels above y=740 anywhere.

Variants: 4 baggy knit jumpers (cable knit, ribbed, with brass buttons or gear patches); 4 hoodies with the hood DOWN, bunched as a thick roll around the neck below y=800, drawstrings ending in brass aglets, kangaroo pocket optional; 4 baggy oversized shirts that read as open but are layered over an opaque undershirt or vest, so the coat never shows through.

Add steampunk details: brass rivets, cogs, leather straps, small teal gems, pipe trims. Only clothing pixels; everything else fully transparent, with clean anti-aliased edges. 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 variants weigh more, ornate brass-heavy ones are rarer.

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.