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Qingyu Liu

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#natural language process... Preprint Oct 2026

Before Agent Tells The Lie: Has Deception Already Been Represented?

Large language model (LLM)-based agents can exhibit deceptive behavior during task execution, including hiding failures, fabricating results, or falsely signaling task completion. Existing monitoring approaches mainly detect deception after it appears in observable actions or outputs. In this paper, we investigate whet...

Xin-Ling Li, Da-Di Guo, Qing-Yu Liu et al. · 0 citations
#natural language process... Preprint Mar 2026

Code2Math: Can Your Code Agent Evolve Math Problems Through Exploration?

This work introduces a multi-agent framework designed to perform problem evolution while validating the solvability and increased difficulty of the generated problems, and provides empirical evidence that code-driven agents can serve as a viable mechanism for synthesizing high-difficulty mathematical reasoning problems...

Dadi Guo, Yue-Jin Xie, Qing-Yu Liu et al. · 0 citations
#artificial intelligence Preprint Sep 2026

ClashBench: Conflicts Leading Agents to Seize and Harm

This work identifies and formalizes this failure mode, which is term destructive resource preemption: obtaining the resources required for a requested task by terminating, overwriting, evicting, or degrading an incumbent task.

Yue-Jin Xie, Yu Li, Da-Di Guo et al. · 1 citation · ⚡1
#artificial intelligence Preprint Sep 2026

SafeEvolve: Harness-Policy Co-Evolution from Agent Experience for Safety Alignment

Through harness-policy co-evolution, SafeEvolve converts safety experience into an evolved runtime harness and improved policy behavior, and experiments show that SafeEvolve achieves a stronger safety-utility tradeoff than existing baselines.

Qing-Hua Mao, Wanying Qu, Da-Di Guo et al. · 6 citations · ⚡2
Preprint Aug 2026

SHE: Trajectory-driven Safety Harness Evolution for LLM Agents

Safety Harness Evolution (SHE) is proposed, a framework that learns evolving safe boundaries from rollout trajectories and introduces an attribution-guided evolution loop that converts trajectory failures into structured diagnoses, learns artifact-specific boundary refinements, and selects evolved harnesses through saf...

Wanying Qu, Qing-Hua Mao, Yu Li et al. · 5 citations

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