From Vibe Coding to Agentic Engineering

A summary of Andrej Karpathy's Sequoia Ascent 2026 talk arguing that December 2025 marked the shift from prototype-friendly vibe coding to production-grade agentic engineering. The deck contrasts Software 1.0, 2.0, and 3.0, explains why verifiability shapes AI capability, and outlines the spec-first, guardrail-heavy practices needed to build secure AI systems.