https://han8931.github.io/tags/pi/Recent content in Pi on Han's XYZHugoentabularasa8931@gmail.com (Han)tabularasa8931@gmail.com (Han)This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.Sun, 23 Aug 2026 21:57:42 +0900https://han8931.github.io/agent-harness/Sun, 23 Aug 2026 00:00:00 +0000tabularasa8931@gmail.com (Han)https://han8931.github.io/agent-harness/<p>The word <em>agent</em> gets used very loosely — sometimes it means a chatbot with a tool attached, sometimes a long-running autonomous system. This talk uses a narrower engineering definition and then spends its time on the part nobody puts on a leaderboard: <strong>the harness</strong>, the software wrapped around the model call.</p> <p>The claim in one line: two agents running the same model weights can differ by seven to ten benchmark points, and the difference is entirely the harness. If that holds, choosing an agent is not a model-selection problem — it&rsquo;s a systems-engineering one.</p>