Style: match the attached front-facing steampunk skeleton exactly: painterly semi-realistic rendering, aged ivory tones, brass and copper fittings, small teal glass accents, light from upper left, same fine dark line weight.

Subject: 12 knitted jumpers for a front-facing skeleton, rich steampunk flavour: chunky cable-knit and rib-knit turtlenecks, roll necks and high funnel collars in oxblood, bottle green, charcoal, mustard, oatmeal and navy wool, with brass buttons on shoulder plackets, leather elbow or shoulder patches, copper zip pulls, buckled leather collar straps, a teal glass brooch or gauge pin, and riveted brass trim.

Placement (absolute px): neckline centred on x=512; a turtleneck or high collar may rise to y=758 at x=512, just under the jawbone, and must never cover the teeth, cheek rivets or mandible above y=755. At x=400 and x=624 the collar top is no higher than y=765. The garment must fully cover the cervical vertebrae from y=760 down.

Shoulder line slopes from the collar at about y=800 (x=430 and x=594) down to y=860 at x=0 and x=1024, so it fully covers the clavicles, shoulder joints and copper shoulder fittings, which reach y=880 at the edges. Below that, the garment fills the full width x=0..1024 down to the bottom edge y=1024. Fully opaque inside the outline: no gaps, lace, mesh or transparency where ribs, sternum or bones could show through.

Front-facing and symmetrical in silhouette; asymmetric details such as pins and placket buttons are fine. Only jumper pixels, no head, background, hands or text.

Naming and outputs: write artifacts/jumper_01.png through artifacts/jumper_12.png, plus artifacts/jumper.json, an array of {"file","name","weight"} with integer weights summing to 100. Plain wool knits are common (weights 10-14). Heavily brass-fitted or gauge-pinned variants are rare (weights 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.