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In this brief YouTube short, the speaker defines an "AI harness" as the entire ecosystem surrounding an AI model that enables it to act like a digital human. Using the analogy that the model is the brain, the harness is the body: it comprises the tools the model can use, the playbooks that guide tool operation, and the capabilities that empower the model to accomplish tasks. The explanation emphasizes that without this surrounding infrastructure, the model alone cannot perform useful actions.
