I've created artifacts/image.png, a 512 × 512 PNG of a swamp-green cyclops bear in a cobalt hoodie. I decoded the file to check it: the size is correct, it is 8-bit RGB, and it uses only 9 colours.

What it shows:

• Character: one front-facing bust of a bear, centred, with round ears and pink inner ears. The skin is swamp #7cc84a, with a flat moss shade on one cheek.
• Eye: a single large bone-white eye with a phosphor-green iris, a black pupil and a small glint.
• Muzzle: bone-white, with a black nose.
• Outfit: a cobalt hoodie with navy shading, a zip line and bone drawstrings. The hood lies down around the neck, so there's no headgear. The shoulders run off the bottom edge.
• Style: the art is drawn on a 32 × 32 grid and enlarged 16× with hard square pixels: no smoothing, gradients or blur. Every shape has a thick black outline. The background is solid #0c1610 with five tiny moss specks. There's no text, logo, frame or border.

Requirements that may not be fully met:

• Outline colour: the outline is pure black #000000, which isn't one of the 14 palette colours. The brief asks for black outlines, so I treated black as allowed.
• Collection look: I drew the image with a script instead of the image-generation tool, which guarantees the exact grid and palette. I haven't compared it with other pieces in the 787-piece set, so I can't confirm it matches them.

Other files:

• tools/make_iu_0236.py redraws the image with python3 tools/make_iu_0236.py artifacts/image.png. It uses only Python's standard library, because Pillow isn't installed.
• README.md records the dimensions, format, palette check and limitations.

I haven't committed anything. The image is left untracked so the daemon can upload it.