When the autonomous trading desk at a $2 B hedge fund missed a 250 ms price swing on 2024‑03‑15, the root cause was a hidden dead‑lock in its agent coordination layer.

Pattern 1: The “Fire‑and‑Forget” Bottleneck

Why fire‑and‑forget fails at >50 agents

Most teams ship a fire‑and‑forget API call and call it a day. It looks clean until you cross the 50‑agent threshold and the invisible queue fills up faster than the consumers can drain it. The symptoms are not “missing messages” but jittery latency spikes that appear out of nowhere.

Mitigation: bounded acknowledgment queues