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Han Li

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#artificial intelligence Preprint Oct 2026

AMBER: Training Long-Horizon Web Agents through Append-Only Memory

Modern language-model agents increasingly interact with external environments over long-horizon, multi-step trajectories, where the accumulated interaction history can quickly exceed practical context budgets. To ensure reliability, agents must maintain factual information over long horizons, remember execution errors...

Chinmay Savadikar, Zhao-Yu Zhang, Ming-Yu Zhao et al. · 0 citations
Preprint Jul 2026

KAT-Coder-V2.5 Technical Report

We present KAT-Coder-V2.5, a coding-focused agentic model trained to act autonomously inside real, executable repositories rather than as a single-turn code generator. Its capability is bottlenecked less by model scale than by the scarcity of reproducible environments, verifiable rewards, and high-value trajectories, w...

Bofeng Huang, Fengxiang Li, Hao Xu et al. · 2 citations
Preprint Jul 2026

LoopsBench: From Harness Engineering to Loop Engineering in Coding Agent Evaluation

Coding agent infrastructure is shifting from harness engineering toward loop engineering as coding agents are deployed for sustained long-horizon software development. Existing benchmarks often center on localized tasks or end-state outcomes, offering limited insight into sustained execution. We introduce LOOPSBENCH, a...

Han Li, Zhemin Fang, Rili Feng et al. · 1 citation
Preprint Jul 2026

Failure as a Process: An Anatomy of CLI Coding Agent Trajectories

The findings show that coding-agent failures are predominantly driven by epistemic errors, typically begin within the first few execution steps, and often remain hidden until recovery is no longer possible, suggesting that improving coding-agent reliability requires earlier validation and intervention rather than relyi...

Xian-Hai Zhao, Han Li, Shuai Li et al. · 4 citations

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