Design-First、API-First 與 Code-First：你是在選誰先付出代價？
PM 丟 Figma，工程師回 API spec。起點選錯，後期重構成本可能翻倍。拆解 Design-First、API-First、Code-First 的取捨，並提供 AI 時代的混合實戰框架。
Product Management
Design-First, API-First, and Code-First: Which One Pays the Price First?
A PM drops a Figma link, and an engineer replies with an API spec. Pick the wrong starting point, and later refactor costs may double. This post breaks down the tradeoffs among Design-First, API-First, and Code-First, and offers a practical hybrid framework for the AI era.