Great paper on designing multi-agent systems. How many distinct communication topologies does an LLM multi-agent system actually need? This works claims that it's about six. Technical summary: Researchers grew the codebook capacity from 8 to 64 and the topologies that survived a reward filter kept collapsing to roughly the same six. Two further findings undercut the standard formulation. Edge count correlates negatively with measured token consumption at r about -0.4, so sparsifying the…