Arca nightly collects real-world agent traces and uses a meta-agent to suggest harness changes.

“Um, and so we're able to kind of like take that, take, take that trace, um, put it, put it next to the, the feedback, and every night, we run this process where we take-- collect traces from, uh, the real world-”

“... from our agents in the wild, and run, run a meta agent on top that suggests changes to our harness.”