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Xu-Tao Mao

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#artificial intelligence Preprint Sep 2026

Trust the Brand, Lose Control: How Identity Hijacks LLM Agent Orchestration

LLM agents now execute tasks end to end with permission to change real systems and increasingly orchestrate subagents that differ in capability and cost. Prior work treats the choice of subagent as an optimization problem. Yet the orchestrator makes this choice from the identities that subagents display, and an attacke...

Xu-Tao Mao, Rui Qian, Ling-Han Chen et al. · 1 citation
#small language model Preprint Sep 2026

Taming CoT Obfuscation in VLMs: From Mechanistic Evidence to Activation Enforcement

This work proposes Targeted Anti-obfuscation with Mechanistic Enforcement (TAME), which uses Sparse Autoencoders (SAEs) to combine behavioral feedback with targeted suppression of template-associated activations during RL, providing a path from behavioral monitoring to representation-level oversight for more auditable...

Xu-Tao Mao, Jianing Zhu, Jin-Man Zhao et al. · 0 citations
Preprint Jul 2026

Agents Don't Just Agree, They Remember: Benchmarking Persistent Sycophancy in Stateful Personal Agents

The Personal Agent Sycophancy Benchmark (PASB) is introduced, a 1,600-task benchmark that traces whether a conversational claim is accepted, written into durable agent state, and reused in a later neutral query, and shows that agent sycophancy is fundamentally a state-writing governance problem.

Xutao Mao, Liang Zhao, Leyao Wang et al. · 0 citations

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