cs.SE · 2026-09-29 · No. 128

Software Engineering, 2026-09-29.

2 new papers in cs.SE. Titles, authors, abstracts. Links to arXiv. Want this in your inbox every morning? Subscribe →

01 — The papers

2 entries
  1. 01

    MCP Error Messages Written for Developers Hurt the Most Capable Agents Most

    Xiaonan Xu, Wenjing Wu

    cs.SE · cs.AI

    Many Model Context Protocol (MCP) servers wrap web APIs built for human developers, and their error messages tell the reader to run a command, edit a configuration, open a web page or wait. Many agents that read them can only call the server's tools. In 150 widely used MCP servers, 949 of 3,001 error messages tell the caller what to do next, and half of these steps depend on something the server cannot see about the caller. On credential...

    arxiv.org/abs/2609.35381 · PDF

  2. 02

    Do Coding Agents Reuse Existing Code or Reinvent the Wheel?

    Dongsheng Ma, Sizhe Wang, Xinyi Huang, Zhengren Wang, Yuhan Wang, Luyang Si, Xincheng Wei, Wentao Zhang

    cs.SE · cs.AI · cs.CL

    Coding agents are increasingly deployed for iterative development on real repositories, yet existing evaluation barely answers a basic question: \emph{do coding agents reuse existing code or reinvent the wheel?} The question matters: every duplicated implementation is a fix applied twice and agents produce code far faster than humans can audit, so redundancy accumulates unsupervised. Thus, we present \textbf{RepoReuse}, a multi-turn benchmark...

    arxiv.org/abs/2609.35357 · PDF

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