analysis_claude_code

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Learn Claude Code -- Harness Engineering for Real Agents

The Model IS the Agent

Before we talk about code, let's get one thing absolutely straight.

**An agent is a model. Not a framework. Not a prompt chain. Not a drag-and-drop workflow.**

What an Agent IS

An agent is a neural network -- a Transformer, an RNN, a learned function -- that has been trained, through billions of gradient updates on action-sequence data, to perceive an environment, reason about goals, and take actions to achieve them. The word "agent" in AI has always meant this. Always.

A human is an agent. A biological neural network, shaped by millions of years of evolutionary training, perceiving the world through senses, reasoning through a brain, acting through a body. When DeepMind, OpenAI, or Anthropic say "agent," they mean the same thing the field has meant since its inception: **a model that has learned to act.**

The proof is written in history:

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