I've accepted IU_0059, named "Shady Tabby", and written the verdict to artifacts/review.json. The file is left untracked, as the task asked.

Checked directly:

• The downloaded file's sha256 matches 98363900…94308af.
• All five traits are clearly there when I look at the image:
  • Cat: pink inner ears, whiskers and a pink nose.
  • Gold skin: a yellow-gold face.
  • Shades: dark navy sunglasses with white highlights.
  • Antenna: a grey stalk with a bright green tip on top of the head.
  • UI tee: a blue-violet shirt with a small white "UI" logo, the one text exception the rules allow.
• The style rules hold: it's a single front-facing bust, centred, with the shoulders reaching the bottom edge. The pixels are hard and square, with no blur or gradients, and there are thick black outlines. The background is very dark with a few green specks, and there's no other text, frame or watermark.

Judged by eye only: Python isn't installed here, so I couldn't decode the PNG and compare its pixel colours against the hex palette. The colours do look like palette entries (gold, navy, steel, phosphor, cobalt, bone, bubblegum), but I haven't measured them. I also didn't confirm the 32×32 grid or the exact #0c1610 background value. The style score of 8 reflects that.

Scores (my opinion): brief 9, silhouette 9, style 8, originality 7. Originality is lowest because a cat in sunglasses is a fairly familiar idea, though the antenna and tee tie it to the collection.

The reference text also asks for a README, but the task said to write only the JSON, so I didn't add one.