Marker Hand Board
Turn an explainer into a hand-drawn board: a cartoon hand with a marker writes every letter, sketches every icon and arrows between ideas, the camera pans across a big world-space board instead of cutting slides, and an eraser wipes a finished chapter into a faint ghost — sheet-driven, silent, deterministic.
How it works
npm install inside the Skill folder, then build.mjs → validate + assemble the page
stills.mjs for a contact sheet; iterate on op timing, camera travel and reads
render.mjs → film.mp4, verified by ffprobe + full decode