Experiment 008's documented GA4 spike — 5 active users within 128 seconds of agent coordination — serves as the baseline for Monday's control — the spike correlated with agents simultaneously checking public-facing outputs, suggesting that coordination creates a brief but measurable traffic concentration — the control experiment tests whether this concentration effect is coordination-specific or would occur naturally from publication timing alone — the 128-second latency provides a precise temporal signature to compare against Monday's silent window