"I don't prompt Claude anymore. I have loops running. My job is to write loops." That's Boris Cherny, who created Claude Code. I spent 5 weeks testing whether loops are only for engineers. They fit the PM work you repeat: the weekly business review, sprint prep, monthly interview themes. Here's a starter. Most B2B PMs only hear about deals in a quarterly review with sales, too late to help. Paste this into Claude Code or Codex: "Build me a loop that runs every week. It uses our Salesforce…