Agent Skills: plain

Plain-language rewrite skill that turns existing content or questions into natural prose a smart 12-year-old can retell. Use whenever the user says 白话说 / 说人话 / plain / grok, wants jargon stripped away, or needs a concept, document, or explanation rewritten into concrete spoken language. Prefer this over `learn` for simplification and over `rank` for summarization. Do not use it for single-word vocabulary study.