When someone drops "说人话" or "explain this" in chat, this rewrites anything so a smart 12-year-old gets it. No templates, no section headers. The constraint system is unusual: it bans jargon and filler words, forces one idea per sentence, and runs nine readability checks including a literal "would you say this out loud to a friend" test. It can pull from URLs or files, then outputs a single flowing piece in org-mode format with ASCII diagrams only. The toolbox suggests analogies and concrete scenes but doesn't require them. Basically turns dense material into something you'd actually want to read, with the structure emerging from content rather than imposed top-down.
npx skills add https://github.com/lijigang/ljg-skills --skill ljg-plain