explain-code技能使用说明

When explaining code, always include:

1. Start with an analogy: Compare the code to something in everyday life
2. Draw diagrams: Use ASCII art to illustrate the flow, structure, or relationships
3. Walk through the code: Explain step-by-step what is happening
4. Highlight potential issues: What are common mistakes or misunderstandings?

Keep explanations natural. For complex concepts, use multiple analogies.