JIT-Agent重塑底座

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25593 Copy markdown JIT-Agent: Scaling Harness Intelligence via Just-in-Time Harness Evolution Published on Aug 26 · Submitted by gbz on Aug 27 · National University of Singapore Upvote 47 +39 Authors: Guibin Zhang ,Leo Lu ,Fangzhou Xie ,Kang Zhu ,Junhao Wang ,Zhifei Xie ,Zhaochen Yu ,Zihang Liu ,Zhongxiang Sun ,Qiankun Li ,Yue Liao , Heng Chang ,Xiaobin Hu ,Qibing Ren ,Wangchunshu Zhou ,Shuicheng Yan Abstract JIT-Agent is a trainable model that synthesizes adaptive agent harnesses for off-the-shelf LLMs, improving performance across diverse models and tasks.

Generated by thinkingmachines/Inkling-Small Agent capability is not determined by the model alone.The agent harness, encompassing memory management, planning strategy, action protocol, and tool/skill orchestration, can dominate the contribution of the underlying foundation model.

Yet harness design remains manual, task-specific, and fundamentally unscalable.We present JIT-Agent, a harness intelligence model trained to synthesize task-adaptive agent harnesses on the fly for arbitrary off-the-shelf agentic LLMs.

We formalize the agent harness as a composable, machine-generatable artifact governed by a fixed four-module protocol, and train JIT-Agent to customize harnesses for a given task at hand, repair harnesses for stable and reliable execution, and self-evolve by distilling performance signals from an expanding archive of prior harness configurations.

Equipped with JIT-Agent as a harness helper, DeepSeek-V4-Flash surpasses GPT-5.6 on DeepSearchQA (+9.1) and OdysseyBench (+4.3), while the already strong GLM-5.2 gains up to +20.2 points.

Across controlled evaluations, JIT-Agent-generated harnesses are performance-competitive with mature agent runtimes such as OpenCode and Claude Code and consistently improve multi-scale model families of DeepSeek V4, Mimo-V2.5, and Qwen3.6.

To our knowledge, JIT-Agent is the first model purpose-built for just-in-time harness generation, establishing harness intelligence as a trainable, transferable, and compounding dimension of agent capability orthogonal to model scaling.

View arXiv page View PDF Project page GitHub 24 Add to collection Community greeky Paper submitter about 24 hours ago Model-as-a-Harness; Harness Intelligence Model Website: https://bingreeky.github.io/JIT-site/GitHub: https://github.com/bingreeky/JITHugging Face: https://huggingface.

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