Mark Zuckerberg predicted that 2026 would be the year AI dramatically changed how people work.Bloomberg/Getty ImagesTech CEOs aren't the only ones bragging about their company's AI output.Earnings calls and interviews are filled with mentions of how much code is being shipped by AI.It's an attractive topic to both investors and potential employees, an AI recruiter said.Move over app downloads and EBITDA — the hot metric for CEOs is now AI produc…