Author here. My definition is: you take an agent, remove the model and you’re left with the harness.
Tools, memories, sandboxing, steering, etc
Clean definition, stealing it. Way better than mine: "Now imagine Claude as Shinji and Claude Code as Eva..."
So, client?
But what is an agent without tools?
Clean definition, stealing it. Way better than mine: "Now imagine Claude as Shinji and Claude Code as Eva..."