I predicted in January that 'harness' would be the AI buzzword of H12026 - seems accurate so far. Everyone is talking about harnesses but I'…

I predicted in January that 'harness' would be the AI buzzword of H12026 - seems accurate so far. Everyone is talking about harnesses but I'm not confident that the majority of people (including me!) have a firm grasp on what it means and how it's different from runtimes or frameworks. Stumbled across an excellent article by @hwchase17 from October on the difference between: - Agent Harness - Agent Runtime - Agent Framework Good place to start.

tldr: everyone is converging on the same product shape: a general harness that takes a goal, uses tools, and does knowledge work. once every…
OPEN MEMORY, OPEN HARNESS the industry shifts to closed agent harnesses locking memory behind proprietary apis. https://x.com/hwchase17/stat…
Harness Engineering Derived from what Models can’t do alone: It feels like a good time to step back and reshare some basic mental models for…
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…
Just read @hwchase17’s excellent thread on why agent harnesses are becoming the dominant way to build agents and why they’re intimately tied…

Source: Harrison Chase (X) | 2026-04-22

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