Agent Harnesses are Just Shells

I do most of my AI coding using Amp . It is an AI "agent", meaning it is composed of two pieces. There's the AI model itself&#x2014;currently Claude Opus 4.5&#x2014;which runs on the model provider's servers over an API, and the agent harness, which runs on my machine and allows the AI to run commands, edit files, and so on. The AI model, eh, it crunches numbers. But the agent harness is an…