Overview
The model is the reasoning component, but the surrounding harness determines how that reasoning is used. A harness provides the interaction surface, tools, workflows, context, execution environment, and controls that let the model act. The same model can therefore participate in different systems, including chat, desktop, command-line, cloud-agent, and custom multi-agent environments.
This separation supports a more advanced pattern: an agent operating system that organizes several models, agents, tools, memories, and recurring workflows in one environment.