JackyYang258

Teach a concept through a runnable code example plus a structured walkthrough, instead of a wall of definitions. Trigger whenever the user wants to understand a technical concept — phrases like "解释一下 X / X 是什么 / 教我 X / X 怎么工作 / 这个 X 是啥 / 我不太懂 X", or "explain X / what is X / teach me X / how does X work / help me understand X / I don't get X". Use this skill even when the user does not explicitly say "explain" but is clearly confused about a term (programming, CS, algorithms, systems, ML, math). Default mode is in-conversation lesson; only write a file when the user asks to save notes.