Your agent spent money while you slept. Can you prove why?

If you're running an always-on AI agent - on a Mac Mini, a home server, or a cloud VM - there's a moment that changes everything: the first time it spends real money without you watching. Your agent isn't a tool you pick up and put down. It's not family either. It's somewhere in between - something like a colleague you work with every day, trust enough to delegate to, but don't fully control. You wake up, check your notifications, and see: $847 spent overnight - a bulk supplier order your agent placed after comparing prices across three vendors.