Sketch Color Wipe
A silent hand-drawn-diary film on a 3:4 portrait page: each story beat is drawn three times in place — the sentence in handwriting, then the same scene as black-marker line art, then the same scene again in crayon colour — by horizontal wipe, and a page-curl at the bottom-right turns to the next beat like flipping a sketchbook.
How it works
Author beats (text + scene primitives) in sheet.json
build.mjs validates and assembles the page
render.mjs produces a silent mp4 + report.json