arXiv AI By Jiaming Cheng, Subhransu Das, Rajiv Ramnath

When Does Latent Communication Pay? A Causal Audit of Relayed KV Caches in Multi-Agent LLMs

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arXiv:2608. 04893v1 Announce Type: cross Abstract: Multi-agent LLM systems relay key--value caches instead of text and credit their gains to exchanged ``latent thoughts''.

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Latent communication in large language model (LLM)-based multi-agent systems (MAS) transmits continuous internal representations instead of text, but greater representational capacity does not establish that the receiver uses task-relevant information. End-task performance alone also cannot reveal whether an observed effect depends on message presence, content generated for the evaluated example, or information supplied by a separate agent.