Writing a good brief before you hire a Next.js developer is the single thing that separates projects that land on time from ones that drift for months. After working through 15+ headless builds — some I briefed myself, many I was handed — the pattern is consistent: the brief determines the outcome more than the developer does. The four mistakes I see in almost every agency brief 'Just like our current site, but faster.' This shows up verbatim more than you'd expect. It tells a ...