The Harness
Anatomy of a production agent. The flagship face of the cube.
Tool orchestration The control plane between the model and every tool, API and data source it can touch. Verification loops Automated quality checks that validate agent outputs during execution. Nothing is trusted on reasoning alone. Context and memory The system that supplies the right information at the right time, within and across sessions. Guardrails The fences inside the wrapper: technical and organizational controls on what an agent may decide, access and execute. Observability Watching what the agent thinks, not just what the server reports. Prompt, context and harness engineering Three nested disciplines. Prompt engineering lives inside context engineering, which lives inside the harness.