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A lone activity-pulse icon (a raw model) points along a dashed arrow to the same icon as a bright core wrapped in concentric layers and ringed by tool icons (the model surrounded by its harness).

Harness Engineering Explained: Why an AI Agent Is Model + Harness

Harness engineering is everything built around an AI model (the loop, tools, memory, and guardrails) that turns a raw text generator into an agent that reliably gets real work done. A plain-language guide.

ai-agents harness-engineering llm agent-architecture engineering