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cs.AI2026

Branch2Skill: Efficient Skill Evolution Through Reasoning Trees

Yanwei Ren, Haotian Zhang, Likang Xiao +5

Skill evolution improves agent skills through feedback over time, with failed trajectories often providing informative signals by revealing incomplete or misleading behaviors. Howe…

cs.AI2026

Recycling Failures: Salvaging Exploration in RLVR via Fine-Grained Off-Policy Guidance

Yanwei Ren, Haotian Zhang, Likang Xiao +6

Reinforcement Learning from Verifiable Rewards (RLVR) has emerged as a powerful paradigm for enhancing the complex reasoning capabilities of Large Reasoning Models. However, standa…

cs.AI2025

SPOGW: a Score-based Preference Optimization method via Group-Wise comparison for workflows

Yitong Cui, Liu Liu, Baosheng Yu +5

Large language models (LLMs) have exhibited significant capabilities in addressing challenging problems throughout various fields, often through the use of agentic workflows that a…

cs.AI2025

ContextPRM: Leveraging Contextual Coherence for multi-domain Test-Time Scaling

Haotian Zhang, Liu Liu, Baosheng Yu +5

Process reward models (PRMs) have demonstrated significant efficacy in enhancing the mathematical reasoning capabilities of large language models (LLMs) by leveraging test-time sca…

cs.AI2025

SIGMA: Refining Large Language Model Reasoning via Sibling-Guided Monte Carlo Augmentation

Yanwei Ren, Haotian Zhang, Fuxiang Wu +4

Enhancing large language models by simply scaling up datasets has begun to yield diminishing returns, shifting the spotlight to data quality. Monte Carlo Tree Search (MCTS) has eme…