AI Engineering Paradigm Shift: From Prompts to Harness – Your 2026 Action Guide

The Three Paradigm Shifts in AI Engineering: From Prompts to Context to Harness AI Engineering Paradigm Evolution The core question this article answers: What fundamental changes have occurred in AI engineering practices over the past three years, and why are the methods that used to work no longer sufficient? AI engineering practice has undergone a clear, three-generation evolution from 2023 to the present. Each generation solves a fundamentally different core problem, yet each successive generation encompasses the capabilities of the previous one. Understanding the distinctions between these three paradigms is the prerequisite for grasping the current frontier of Agent engineering …