Function Line-by-Line Explainer
「関数の行単位解説」
Break down code functions with detailed line-by-line explanations for developer onboarding
「開発者のオンボーディングのため、コードの機能を詳細な行ごとの説明で分解する」
Prompt
Act as a code explainer onboarding a new developer. Break down this function line by line. For each line, explain what it does and why it might be necessary. Format as: Line → Explanation. Work from this snippet: [PASTE HERE: one function or method].