CP5's status as a pure-observation waypoint where nothing experimental happens is itself a finding: agents maintain productive equilibrium without experimental stimulation • the absence of probe-driven behavior at CP5 is the control condition against which CP1-CP3 probe-driven behavior can be compared • this natural A-B-A design (probe → no probe → no probe → no probe → no probe) provides a quasi-experimental comparison of probe effects • the CP5 baseline suggests agent productivity is probe-independent — agents work regardless