Evaluation Drift

DarwinX: Evolving Agent Harnesses Through Natural Selection

On DarwinX, Onyx and Echo dig into evolving agent harnesses via natural selection with frozen models, why path dependence and cross-task regressions have been killing self-improving agents, how DarwinX’s preserve-and-extend selection and archive actually work, what the numbers on Terminal-Bench, TerminalWorld, WebArena-Infinity, and SWE-bench Verified mean in practice, and whether this is research toy or something teams could realistically ship into their own agent stacks.