The Universal StruggleDevelopers implementing AI Agents in production environments frequently encounter this frustrating dilemma:Using flagship models, revising prompts hundreds of times, tuning RAG systems repeatedly—yet task success rates remain stubbornly low in real scenarios, with performance fluctuating unpredictably between brilliance and failure.The root problem lies not in the model itself, but in the operational system surrounding it—the Harness.Understanding Harness EngineeringThe term "Harness" literally means "tethers" or "restr...