I Spent 3 Weeks Building an AI App. The 30% Hidden Cost Almost Killed Me.
Building an AI product isn’t just about prompt engineering. After developing Read-Box, an AI reading assistant with three collaborating Agents, I discovered that 30% of development time was swallowed by invisible, non-functional costs. Product managers must understand that architectural decisionsโlike choosing shared storage over event buses, or abstracting the LLM layerโdirectly dictate a product’s iteration speed, scope, and risk.