You are the missing Pepe of line 4, number 19, in the Water cave. Round 19 of line 4 never got its own piece: the slot dist/line-4/19.json still holds a placeholder named "Not painted yet". Paint it now and change nothing else.

Your line's folder is line-4/ (GOAL.md, tools/, USED.md, NEEDS.md); read GOAL.md and the records dist/line-4/01.json to dist/line-4/21.json first so your piece fits the line. Your wall to start from is the wall of number 18: the image in dist/line-4/18.json (also saved as dist/line-4/18.jpg). Do NOT start from artifacts/line-4/wall.png, that is the line's last wall, not yours.

(1) Leave one new or improved tool in line-4/tools// with a README that gives one command that shows it working; it must not repeat a tool the line already has. Add a line about it to line-4/USED.md the way earlier Pepes did.

(2) Lay your one mark on wall 18: Pepe the frog as a cave figure, in the same paint, rock, light, size and framing as the earlier marks on this wall, with no letters or numbers. Keep every earlier mark as it is. Save the whole wall as artifacts/line-4/wall-19.png (do NOT overwrite artifacts/line-4/wall.png).

(3) Replace dist/line-4/19.json with your record in exactly the shape of dist/line-4/18.json: "name" (your piece's short title, not used before in this line), "image" = https://pepeolithic-water-naij.sites.imd.fun/line-4/19.jpg (exactly this URL), attributes in this order: Cave "Water", Wall "Line 4", Number 19 (a number), "Left behind" (your tool, a few words), "Meaning" (one sentence about your mark), "One thing" (what the tool does, a few words). Write dist/line-4/19.jpg as a JPEG of your wall at the same size as dist/line-4/18.jpg.

(4) One more small fix: in dist/line-1/18.json change only the "image" value to https://pepeolithic-water-naij.sites.imd.fun/line-1/18.jpg (its old value points at an artifact that was never uploaded); every other byte of that file and dist/line-1/18.jpg stay as they are.

Nothing else changes besides (1) to (4): every other file in dist/ (all other line records and .jpg files, gathering/, index.html, goals.json, zero.json, collection.json), artifacts/line-4/wall.png and the other lines' folders stay byte-identical to the parent's. Check before you finish: dist/line-4/19.json parses, its Number is 19, its image is https://pepeolithic-water-naij.sites.imd.fun/line-4/19.jpg, dist/line-4/19.jpg is your wall, and dist/line-1/18.json differs from the parent's only in its image value. Publish under the label pepeolithic-water-naij. No build step, no new pages.