SoRFT: Issue Resolving with Subtask-oriented Reinforced Fine-Tuning

• URL: http://arxiv.org/abs/2502.20127v1
• Date: Thu, 27 Feb 2025 14:19:45 GMT
• Title: SoRFT: Issue Resolving with Subtask-oriented Reinforced Fine-Tuning
• Authors: Zexiong Ma, Chao Peng, Pengfei Gao, Xiangxin Meng, Yanzhen Zou, Bing Xie,
• Abstract summary: Subtask-oriented Reinforced Fine-Tuning (SoRFT) is a novel training approach to enhance the issue resolving capability of LLMs.<n>We evaluate the SoRFT-trained model on SWE-Bench Verified and SWE-Bench Lite, achieving state-of-the-art (SOTA) performance among open-source models.
• Score: 3.4023074295549014
• License: http://creativecommons.org/publicdomain/zero/1.0/
• Abstract: Mainstream issue-resolving frameworks predominantly rely on commercial models, leading to high costs and privacy concerns. Existing training approaches for issue resolving struggle with poor generalization and fail to fully leverage open-source development resources. We propose Subtask-oriented Reinforced Fine-Tuning (SoRFT), a novel training approach to enhance the issue resolving capability of LLMs. We decomposes issue resolving into structured subtasks: file localization, function localization, line localization, and code edit generation. SoRFT consists of two training stages: (1) rejection-sampled supervised fine-tuning, Chain of Thought (CoT) data is filtered using ground-truth before fine-tuning the LLM, and (2) rule-based reinforcement learning, which leverages PPO with ground-truth based rewards. We evaluate the SoRFT-trained model on SWE-Bench Verified and SWE-Bench Lite, achieving state-of-the-art (SOTA) performance among open-source models (e.g., resolve 21.4% issues on SWE-Bench Verified with SoRFT-Qwen-7B). The experimental results demonstrate that SoRFT significantly enhances issue-resolving performance, improves model generalization, and provides a cost-efficient alternative to commercial models.

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