Wiring AI agents as direct synchronous calls rebuilds the distributed monolith. Put an event log between them and buy durability, replay, and audit for free.

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Many multi-agent systems simply replace service calls with agent calls, creating the same tightly coupled, failure-prone architecture. A single slow or stuck agent can stall the entire workflow, and without a persistent event history, debugging becomes nearly impossible. Instead, let agents communicate through an event log or broker, publishing typed events that other agents subscribe to. This decouples the system, enables replay, durability, backpressure, and auditing, and makes multi-agent workflows far more resilient in production.