Author

Zong-Si Xu

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#artificial intelligence Review Oct 2026

S$^2$-MAS: A Society-Scale Multi-Agent Simulation Framework with 500 Million Household Persona Agents

Simulating economic responses at society scale requires agents whose decisions reflect household circumstances and the effects of earlier actions. We introduce S$^2$-MAS, a society-scale multi-agent simulation framework built on 500 million synthetic household personas grounded in real-survey data. Its Genese engine se...

Yang Li, Yi-Ke Wang, Diane Wan et al. · 0 citations

Preprint Sep 2026

From Evidence to Effect: Authority Semantics and Runtime Infrastructure for Stateful Agents

The findings connect authority information, effect admission, and infrastructure reuse in stateful agents to connect authority information, effect admission, and infrastructure reuse in stateful agents.

Yang Li, Zong-Si Xu, Sergey Volkov et al. · 0 citations

#artificial intelligence Preprint Sep 2026

ASCT: Attentive Search over Counterfactual Trees for Credit Assignment in Agentic Reinforcement Learning

Attentive Search over Counterfactual Trees (ASCT) is introduced, a framework that turns training-time multi-step search into local action credit and connects counterfactual evaluation to policy learning while deploying the actor alone.

Yang Li, Jin-Han Yang, Hai Liu et al. · 0 citations

Preprint Sep 2026

Beyond Agent Harnesses: Cross-Substrate Authority for Multi-Agent Systems

Agentic systems persist model-visible memory while mutating workspaces, while a runtime, registry, or approval service may hold authority state outside both. Identical final files can then require opposite safe actions. We call this the cross-substrate authority gap: decision- relevant authorization information resides...

Yang Li, Sergey Volkov, Hai Liu et al. · 0 citations