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The Rise of Agent Harness Engineering

Why the Model Doesn't Matter (As Much As You Think): The Rise of Agent Harness Engineering the transition from vibe coding to the more rigorous discipline of harness engineering in the development of AI agents. While vibe coding allows creators to build software through natural language and "vibes," it often lacks the stability required for complex, production-grade systems. To address this, harness engineering provides a structured software infrastructure—the agent harness—that manages tool use, memory, and state persistence outside of the model's reasoning.