Canvas: 1024x1024 RGBA PNG with a transparent background. Character is FRONT-FACING and symmetric about x=512.

Style: match the attached base exactly. Fine dark ink outlines, painterly shading, aged-leather texture. Palette is dark black-teal leather/knit, deep teal fabric, brass/gold trim, gears, rivets and teal gem accents. No rust, orange or warm brown tones.

Placement (corrected from the image; the skull jaw actually ends near y=848):

• Neckline: a collar/neck opening centred at x=512, spanning about x=370..655. Top edge at y≈790, tucked under the jaw so it reads as being behind the chin. Leave the jaw area x=360..665, y<848 unpainted except the collar band behind it.
• Shoulders: slope from the collar out to the canvas edges, reaching x=0 and x=1024 at about y=890-900.
• Optional high collar or lapels may rise to y≈755 between x=215 and x=810 only.
• Body: fills down to the bottom edge y=1024 across x=0..1024.
• Paint only inside this torso silhouette. Everything above the shoulder line and outside the garment must be alpha 0. No fills, wedges, slivers or background.

Variants: 12 steampunk jumpers/sweaters. Examples:

• cable-knit teal jumper with brass buttons
• leather-patched pullover
• turtleneck with gear brooch
• ribbed knit with brass buckle straps
• quilted aviator jumper
• jumper with pocket-watch chain
• sweater vest over cravat
• riveted leather-yoke knit
• argyle with brass studs
• hooded knit with gear toggles
• roll-neck with teal gem pin
• rare ornate filigree-embroidered jumper

Outputs: artifacts/jumper_01.png .. artifacts/jumper_12.png.

Weights file: artifacts/jumper.json, an array of {"file","name","weight"} with integer weights summing to 100. Common variants get roughly 10-12; rare ornate ones get 2-4. 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.