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Huiqi Deng

Sun Yat-Sen University

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#natural language process... Preprint Sep 2026

Faithful Activation Verbalization: Reducing Hallucinations in LLM Representation Interpretation

A two-stage framework that first reconstructs source text from a hidden activation and then evaluates the resulting text with a separate frozen question-answering model, yielding an explicit and inspectable intermediate readout is introduced, enabling compact cross-model inverters to surpass donor-matched question-cond...

Hai-Yan Zhao, Zi-Rui Hei, Wei Shi et al. · 0 citations
Preprint Aug 2026

SkillEval: Decomposing Agent Skill Quality into Interpretable Signals

SkillEval is used to evaluate skills in controlled quality tests and it is used for diagnosing weaknesses in skill documents and guiding targeted revisions, and it is shown that SkillEval reliably distinguishes skills of different quality.

Jia-Hui Han, Qinuo Li, Ziheng Peng et al. · 1 citation
Jul 2026

Do LLMs Know Their Vulnerable Scenarios?

This work shows that scenario-wrapped prompts activate internal scenario directions whose causal steering consistently reduces refusal scores, and proposes Concept2Scenario, a concept-based attribution framework for vulnerable scenario discovery that instantiates a broad concept space with a sparse autoencoder, transla...

Ziheng Peng, Huiqi Deng, Haoran Jing et al. · 0 citations

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