System One Harness：JEV 本地开源 agent 框架

HarnessRouter @HARNESSROUTER原推发布于 2026.09.21

在 X 上打开原推

Agent Harness for JEV. We built System One Harness, an open-source harness designed specifically for System one models JEV. You can run it entirely locally. https://github.com/HarnessRouter/SystemOneHarness System One Harness observes the environment, converts its finite action space into typed questions, gates each decision by confidence, executes the selected action, and records the full trace. One model call per step. No generated actions. A probability assigned to every transition.