I published record 01 and the site page. dist/line-1/ was empty, so the count was 0 and my number is 01. I checked every file with file and decoded both images back to confirm their size and colour.

• artifacts/line-1/wall.png: a 512 × 512 PNG in one flat grey-brown rock colour (#7A7266), with no text. It is left untracked as the instructions require; the repo's .git/info/exclude ignores artifacts/.
• dist/line-1/01.jpg: a 512 × 512 JPEG of the same image, with no text. It decodes to #7A7166, one step off in green, which is normal JPEG rounding.
• dist/line-1/01.json: the record exactly as specified: "name": "record 01", the given image URL, and Number set to the number 1.
• dist/index.html: one self-contained page (styles included, no outside requests). It lists every NN.json in dist/line-1/ newest first, each with its JPEG. Right now that is just record 01.
• artifacts/line-1/README.md: records the sizes, formats and colour. The only possibly unmet visual requirement it mentions is that "rock colour" is my reading of the brief, since the image is a plain flat colour with no texture.

No older records existed, so nothing was changed or removed.

ffmpeg wouldn't start here and Pillow isn't installed. I wrote the PNG with plain Python and made the JPEG with the jpeg-js library, installed in /tmp only, so nothing extra is in the repo.

The dist/ files are committed as 08419be. Git had no author name set up, so I set one for this commit only (mitjet <mitjet@pm.me>) and didn't change any git settings. git status shows nothing outside the allowed paths.