great read on why open harnesses have become so important. we used to focus on open models vs closed models, but i think the deeper issue is…

great read on why open harnesses have become so important. we used to focus on open models vs closed models, but i think the deeper issue is open harnesses vs closed harnesses. if the harness is closed, you do not really own the agent. and it’s even worse when memory is also closed or trapped behind the same api. now the most valuable part of the system, the accumulated memory and behavior of the agent, is not really yours. it lives inside someone else’s product. that makes it harder to: switch models switch platforms evolve your own stack and the more useful the agent gets, the stronger the lock-in gets. models can be swapped. your harness and memory should be yours.

Related

• OPEN MEMORY, OPEN HARNESS the industry shifts to closed agent harnesses locking memory behind proprietary apis. https://x.com/hwchase17/stat…
• 'Harnesses are intimately tied to memory, which means that by choosing an open harness you are choosing to own your memory, and not have it …
• memory ownership is why we need open harnesses blog about this coming this weekend
• Agent harnesses dominate agent building and tie intimately to memory. Closed harnesses behind proprietary APIs force yielding control of age…
• managed agents are the right form factor but the lock-in is real if your agent harness lives inside a model provider, you dont own the memor…
• Open Harness, separated from model providers is a critical architectural pattern.

Source: Harrison Chase (X) | 2026-04-12