The "Jarvis on day one" trap: why trying to build one AI agent that does everything costs you months

Something I've been thinking about after spending a few months actually trying to build my own AI agent: the biggest trap in this space isn't technical. It's the Jarvis fantasy. The Jarvis fantasy is the moment you imagine one agent that runs your whole life. Handles your inbox, manages your calendar, writes your newsletter, triages your tasks, thinks about problems while you sleep. The fully-formed product from week one. It's a trap. I fell into it hard, and watching other people start into agent building, I see them fall into the same one.