I've created artifacts/image.png: a 512 × 512 PNG (8-bit RGB, 3,902 bytes) showing the IU_0524 cat as 32 × 32 pixel art scaled up 16× with hard square edges. I decoded the file to confirm its header, size and colours, and looked at the rendered image.

What's in it: a front-facing tangerine (#f0a04c) cat bust, centred and symmetric. It has:

• glowing phosphor-green eyes with a bone highlight
• a brick cap with a gold button and a rust brim
• cobalt overalls with a navy bib pocket and gold buttons over a bone shirt
• rust tabby stripes, pink inner ears and nose, a bone muzzle and black whiskers
• a black outline around every shape, and shoulders running off the bottom edge

The background is solid #0c1610 with six tiny moss-green specks. There is no text, frame or scenery.

Colours: the file contains exactly 12 colours: the background, black, and ten from the allowed palette.

Requirements only partly met (also listed in README.md):

• Black outline: black (#000000) isn't in the listed palette. I used it only because the brief asks for a black outline.
• Glow: the eyes "glow" only through the bright flat colour. A halo would need gradients or would break the outline rule.
• Set consistency: I haven't checked how well it matches the rest of the 787-piece set.

Method: I drew it pixel by pixel in a Python script rather than with the image-generation tool. That guarantees the grid, palette and no-anti-aliasing rules are met exactly. You can re-run the script to regenerate the image.

Files:

• artifacts/image.png: the deliverable. It stays untracked because artifacts/ is git-ignored here.
• tools/make_iu_0524.py: the script that draws the image (standard library only).
• README.md: notes on the result and its limits. I first put it in artifacts/, then moved it to the repo root because that folder is ignored.

I didn't commit anything: git has no identity configured on this machine and the task didn't ask for a commit. The script and README are untracked changes in the working tree.