Fat-Router Agents Fail in Production, Pushing Teams Toward Thin Orchestrators
VectorWireAI · reddit · 2026-11-13
A synthesis of production multi-agent architecture trends argues the most consequential shift is subtraction: strip the orchestrator down to a dispatcher owning sequencing and reliability checks, push domain reasoning into specialist agents, and treat context management as a first-class engineering problem.
Key points
- The "fat router" design—one agent accumulating all domain knowledge and tool access—is a production anti-pattern whose failure mode is hallucination under load
- The replacement architecture is legible across independent engineering disclosures from Meta, LangChain, AWS and MLflow, though evidence strength varies sharply across sources
- The pattern's limits are already visible in the delegation-scope failures it introduces
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