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Jin-Hao Dong

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#machine learning Preprint Sep 2026

Groupwise Agentic Grading and Advantage Redistribution for Code Agent RL

Reinforcement learning (RL) for code agents often uses executable tests to provide binary rewards. With these rewards, Group Relative Policy Optimization (GRPO) assigns identical advantages to test-passing trajectories within each rollout group, overlooking differences in implementation quality and adherence to task re...

Jin-Hao Dong, Liang Zhao, Zi-Hao Yue et al. · 0 citations
Book Open access Aug 2026

BiVCoder: A Multi-Agent Framework for Code Generation via Bidirectional Code-Test Diagnosis

This work proposes BiVCoder, a diagnosis-driven multi-agent framework featuring a novel bidirectional code-test diagnosis mechanism, and introduces BiVCoder-SFT, a role-specific instruction fine-tuning scheme.

Xiaoyang Li, Jin-Hao Dong, Wenhang Shi et al. · 0 citations
Book Open access Aug 2026

BiVCoder: A Multi-Agent Framework for Code Generation via Bidirectional Code-Test Diagnosis

Large Language Models (LLMs) have demonstrated remarkable potential in automated code generation. However, existing test-driven code generation and refinement frameworks are often hindered by the tests' quality: they typically treat self-generated tests as ground truth, leading to ineffective debugging loops where code...

Xiaoyang Li, Jinhao Dong, Wenhang Shi et al. · 0 citations
Book Open access Apr 2026

DBcover: A White-box SQL Test Generation Framework for Coverage Improvement

DBcover is proposed, an LLM-driven database test generation framework that performs white-box, code-aware SQL test generation through contextual reasoning, and substantially outperforms existing fuzzers.

Yan-Kai Rong, Shuang Liu, Jin-Hao Dong et al. · 0 citations

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