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Zhibang Yang

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#machine learning Preprint Sep 2026

When Sparse Reward Meets Dense Distillation: Training Dynamics of On-Policy Distillation

The cross-signal NTK is introduced, a token-level statistic that measures the alignment between reward and distillation gradients at position n and an empirical threshold beyond which naive mixing can lead to persistent training collapse is revealed.

Xin-Ke Jiang, Tao Feng, Zhi-Bang Yang et al. · 0 citations
#machine learning Preprint Sep 2026

GenMem: Generative Symbolic Memory for Self-Evolving Harness

GenMem is presented, which reformulates memory management as generative symbolic addressing, a multi-level discrete token tuple drawn from a Cartesian-product address space that factorizes a million-scale sparse memory space using fewer than one hundred discrete symbols.

Xin-Ke Jiang, Tao Feng, Wei-Xuan Xu et al. · 0 citations
Preprint Aug 2026

LoongReflect: Boosting Long-Horizon Reflection in Search Agents via Global Perspective Distillation

LoongReflect is proposed, a training framework that formulates reflection as a memory-control policy over a reversible trajectory tree using explicit reflect and backtrack actions and demonstrates consistent improvements over outcome-only reinforcement learning and self-distillation baselines.

Zhi-Xin Zhang, Xin-Ke Jiang, Zhi-Bang Yang et al. · 0 citations
Preprint Aug 2026

Harness-RL: Black-Box Reinforcement Learning with Action-Args Decoupling for Central-Agent Multi-Agent Harnesses

Harness-RL is introduced, a structured reinforcement learning framework that combines Conflict-Aware Policy Optimization (CAPO) with interface-level black-box trajectory construction and supports both central-only and joint multi-agent training.

Xin-Ke Jiang, Zhi-Xin Zhang, Zhi-Bang Yang et al. · 1 citation

ScaffoldAgent: Utility-Guided Dynamic Outline Optimization for Open-Ended Deep Research

ScaffoldAgent is proposed, a utility-guided dynamic outline optimization framework for OEDR that models outline evolution as a structured decision process with three operations: Expansion, Contraction, and Revision, enabling controlled updates to the report scaffold.

Zhibang Yang, Xinke Jiang, Yuzhen Xiao et al. · 1 citation
#artificial intelligence Preprint Aug 2026

AgenticRag-R1: Agentic Reinforcement Learning with Stack Memory for Multi-Step Reasoning, Retrieval and Memorizing

This work proposes AgenticRag-R1, a RL framework that deeply integrates reasoning, retrieval, and memory via a memory stack and fine-grained action space, supported by hierarchical action-aware rewards and an information-aware trajectory rejection strategy to enable effective long-horizon learning.

Xin-Ke Jiang, Yue Fang, Zhi-Bang Yang et al. · 2 citations
Jul 2026

Beyond Fail-to-Pass: Iterative Hardening of Co-Generated Bug Reproduction Tests and Fixes

CoHarden is proposed, a co-generation framework that uses the Lax signal as an in-loop convergence criterion that generates a test before any fix, then iteratively hardens the test and fix against surviving mutation patches until the generated test no longer admits Lax regressions.

Yuhao Tan, Zhibang Yang, Fangkai Yang et al. · 1 citation
Jul 2026

ToolAtlas: Learning Once, Reusing Everywhere with Tool-Side Memory

This work introduces ToolAtlas, a graph-based framework that builds a persistent provider-side tool memory of tool capabilities, failure boundaries, and cross-tool compositions through execution-verified probing and establishes provider-side tool memory as an effective and reusable paradigm for tool servers.

Yue Fang, Zhibang Yang, Fangkai Yang et al. · 0 citations

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