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cs.AI2026

MemLeak: Cross-User Semantic Leakage in Multi-Tenant AI Agent Memory

Priyanka Mudgal, Kai Zhao, Guilin Zhang +4

Personal AI agents in enterprise multi-tenant deployments share a common vector store for long-term memory. Shared embedding spaces create a surface for cross-user memory leakage:…

cs.AI2026

Budget Boundary Effects in Test-Time Mathematical Reasoning

Guilin Zhang, Ziqi Tan, Wulan Guo +5

A cumulative token cap can fall inside a mathematical derivation, forcing a test-time controller to choose between stopping at the cap (strict) and allowing the current attempt to…

cs.AI2026

Report: Progressive Disclosure of Agent Skills

Guilin Zhang, Kai Zhao, Priyanka Mudgal +4

Users of Workday's deployed LLM-based agents often request features which can be addressed by defining named procedures, also known as skills, in the LLM context, effectively augme…

cs.AI2026

Winning by Peeking: Unenforced Budgets and Test-Set Selection Inflate Short-Budget AutoML Comparisons

Guilin Zhang, Kai Zhao

Comparisons between AutoML systems at short time budgets -- tens of seconds rather than hours -- are common in tool READMEs and workshop papers, and they are easy to get wrong. We…

cs.AI2026

Deployment-Time Memorization in Foundation-Model Agents

Lei, Chen, Guilin Zhang +8

Foundation-model agents are increasingly long-lived systems that remember users across interactions, making memorization an explicit deployment-time function rather than solely a p…

cs.AI2026

Xpertbench: Expert Level Tasks with Rubrics-Based Evaluation

Xue Liu, Xin Ma, Yuxin Ma +36

As Large Language Models (LLMs) exhibit plateauing performance on conventional benchmarks, a pivotal challenge persists: evaluating their proficiency in complex, open-ended tasks c…

cs.AI2026

Adaptive Memory Admission Control for LLM Agents

Guilin Zhang, Wei Jiang, Xiejiashan Wang +5

LLM-based agents increasingly rely on long-term memory to support multi-session reasoning and interaction, yet current systems provide little control over what information is retai…