The Harness Is the Company
3 hours ago
- A harness broadly refers to all infrastructure, interfaces, context, and state that surround a stateless LLM, including tools like LangGraph and coding agents.
- SaaS businesses follow a trajectory from no harness, to individuals operating harnesses, to orchestrating harnesses, and finally to harnesses orchestrating individuals—turning the company itself into a harness.
- In a harness-driven company, core tasks are done by agents, the product is model output, and humans become part of the harness by providing taste and judgment where it matters most.
- Building a harness does not necessarily lead to low-quality output; instead, it can maximize customer value by spending human attention only where needed.
- The harness becomes the core differentiator for a company, shaping trust, distribution, efficacy, and domain context—more important than traditional org structures.
- Companies are beginning to build in-house AI developer tools (e.g., Ramp, Stripe, DoorDash) as the start of this trend, and they should own the top-level harness while plugging in vendor products for specific workflows.
- Implications include a rise in in-house harness building, reshaping of org roles, AI-native startups beating incumbents in harness-friendly domains, and the need for all software to be headless for the harness to operate.