Field notes of building an AI agent tool and pondering about bigger things. I'm a CEO building an AI agent tool, and lately I've been watching our Claude bill the way you watch your phone battery at 12% with no charger in sight. It started when we ran out of credits in the middle of an agent run. One moment the pipeline was humming, the next it just stopped. After that, I began refreshing the balance compulsively. In one work week, with less than three hours a day of agent us