Mental BoundAn agentic harness is the system that runs agents together. The model supplies the reasoning; the harness supplies everything around it — how each agent connects to your tools, what it is allowed to do, when it runs, and how a person stays in the loop. On its own, a language model only answers; the harness is what lets it act.
A typical harness wires up one or more agents, each with a defined job, the workflows that sequence their steps, connectors to your systems (often through MCP and tool use), shared memory, schedules and triggers, and guardrails that set approvals and limits. The models underneath are swappable — the harness routes each task to whichever one fits.
The name comes from engineering, where a harness is the rig that holds a system together and keeps it under control while it runs. As models become interchangeable, this surrounding layer is where the durable value moves: it is the part shaped around your work, your tools, and your rules. Mental Bound designs and builds custom harnesses around real goals — see the agentic harness solution.