What Is an AI Agent Harness? (The Secret Behind Claude Code)

If GPT-5 and Claude Opus 4.7 are so smart, why do most AI agents break down after ten minutes of real work? The answer isn't the model. It's the agent harness. 🚀 Check Out My Data/AI Courses: https://whop.com/the-data-guy-llc/ Use Code dataguysub for 25% off! 🚀 Get Source Code and Bonus Content: https://patreon.com/TheDataGuy?utm_me... ⚡ Follow my Substack: https://substack.com/@thedataguygeorge In this video, we break down what an agent harness actually is, why it's the most critical layer of your AI stack, and how the best tools on the market (like Claude Code, Cursor, and LangGraph) use them to turn raw LLMs into production-grade workers. An agent = a model + a harness. Stop obsessing over the newest LLM and start building the infrastructure that lets it actually get work done.