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researcher

Hanjun Wei

7 papers hereh-index 9264 citations24 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position
  • middle author6

Across the 6 of 7 papers where every author was matched, so the position is known.

fields
  • cs.SE3
  • cs.AI2
  • cs.CL1
  • cs.LG1

identity via Semantic Scholar / OpenAlex

works on
benchmark 1benchmark evaluation 1code language models 1group relative policy optimization 1guide generation 1language models 1learning rate effects 1model scaling 1multimodal learning 1prompt engineering 1representation analysis 1screenshot grounding 1

From the 3 of 7 linked papers with an AI index.

collaborators
Showing cs.SEShow all

3 papers · 1 filter

cs.SE2026

Auditing and Decomposing Feedback-Driven Evolution in LLM Test Generation under the Oracle Problem

Yunhao Liang, Chengguang Gan, Ruixuan Ying +3

Execution feedback is often treated as a self-verifying signal for improving LLM-generated tests. However, when generated inputs are executed on a single accepted program and its o…

cs.SE2026

Security Tests as Executable Specifications for LLM Code Generation: Benefits, Trade-offs, and Coverage Limits

Yunhao Liang, Chengguang Gan, Ruixuan Ying +3

Large language models (LLMs) can generate functionally useful code that remains vulnerable, while security-focused interventions may break intended behavior. We investigate securit…

cs.SE2026

Do Code Language Models Use Tests? A Behavioral and Representational Study of Test-Driven Code Generation

Yunhao Liang, Chengguang Gan, Ruixuan Ying +3

The paper investigates how code language models respond to test cases in prompts, analyzing whether tests act as executable specifications or merely extra context, and finds that t…

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