Style: bold cel-shaded 1980s disco cartoon, thick black outlines matching the base, flat colours, hard shadow tone, glossy white highlight streaks.

Pose: slight-right facing, chin slightly raised, head-and-shoulders framing with bare shoulders, so draw every item in that perspective, with the drape shifted a few px toward viewer's right. Materials come from the item (polished gold, cream pearls, velvet, satin, rhinestones), never skin-toned. Placement for chains, ropes, medallions and pearls: the two upper ends meet the neck outlines at x=405 and x=640 at y≈870-880 and vanish behind the neck there.

The front hangs with weight onto the upper chest inside x=292..788, y=783..1024, with no chain on the back of the neck. Medallion centres sit at about x=530, y≈960-1000, max 110px wide.

Placement for chokers: a band hugging the narrow neck at y≈770-810, spanning the neck outlines from about x=420 to x=628. The band curves slightly down at the front centre (x≈530), and only the front arc is drawn. Nothing touches the chin (y=672) or the hair.

Variants: 01 thin gold rope chain; 02 two layered gold rope chains of different lengths; 03 thick gold rope chain with a large sunburst medallion; 04 gold rope chain with a mirror disco-ball medallion; 05 heavy rope chain with a lion-head medallion; 06 single strand of cream pearls; 07 double strand pearls; 08 long pearls with a gold drop clasp; 09 black velvet choker with a small gold charm; 10 rigid polished gold collar choker; 11 purple satin choker studded with rhinestones; 12 stacked set of a gold choker, a rope chain and a big medallion.

Outputs: artifacts/neck_01.png .. artifacts/neck_12.png and artifacts/neck.json, an array of {"file","name","weight"}.

Weights: 01:14, 02:10, 03:8, 04:6, 05:5, 06:12, 07:9, 08:7, 09:11, 10:7, 11:8, 12:3 (sum 100). Write artifacts/neck_01.png .. artifacts/neck_12.png and artifacts/neck.json: an array of {"file","name","weight"} with weights summing to 100, rarer lower.