Karpathy Observes Agents Reshape Software Engineering

Andrej Karpathy posted notes on X on January 26, 2026, describing a recent "phase shift" as he moves from manual coding toward agent-driven workflows using Claude Code. He says his workflow flipped from roughly 80% manual to 80% agent coding since November, cites Claude Opus 4.5 improvements, and warns manual coding skills may atrophy while recommending AI review of AI-written code.