I've created artifacts/image.png: a 512 × 512 PNG (8-bit RGB) of a bubblegum-pink frog with big eyes, no headgear and overalls. I checked the file header and dimensions and looked at the rendered image myself; nobody else has reviewed it.

What it shows:

• Character: one frog, front-facing and centered, with its shoulders running off the bottom edge. It has big bulging eyes with navy pupils, small tangerine cheeks, nostrils and a smile.
• Outfit: cobalt overalls with straps and a bib, a navy pocket and gold buttons.
• Pixel art: drawn on a 32 × 32 grid and scaled up 16× with hard square pixels, so there's no anti-aliasing, gradient or blur.
• Outline: a black outline, one grid pixel thick, around every shape.
• Background: solid #0c1610 with six small moss-green specks. There is no scenery, text, logo, frame or border.

Requirements not fully met:

• The outlines are pure black (#000000), which isn't in the listed palette. The style rules also ask for a black outline, so I followed that.
• The eye bulbs sit one grid pixel below the top edge, which makes the framing tight.
• I haven't compared it against the rest of the 787-piece set, so I can't confirm it matches the collection look.

I didn't use the image-generation tool. Instead, tools/make_frog.py draws the grid and writes the PNG using only Python's standard library, so it doesn't need any installed packages. Running python3 tools/make_frog.py regenerates the image exactly. artifacts/README.md records the format, dimensions, colours used and the gaps above.

Nothing is committed. image.png is left untracked for upload as asked, and tools/ is also still untracked.