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Jin-Fu Chen

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Preprint Oct 2026

Agent Skill Evolution: How Revisions Affect Coding Agents

Agent Skills, the SKILL.md files that tell an LLM coding agent how a project works, are revised like code, yet what a revision does to the agent is unknown. From 2,608 first/last revision pairs of 3,159 Skills, we characterize how Skills evolve and how they change together with the configuration of the agent's harness....

Jia-Jie Wang, Yu-Tong Zhao, Tian-Lin Li et al. · 0 citations
Preprint Sep 2026

Merged, Not Measured: An Empirical Study of Performance Issues Fixed by Coding Agents

Coding agents open pull requests (PRs) that claim to speed up software, but studies of human performance fixes say little about how maintainers respond to such a fix or whether its claim holds. From the 71,677 agent PRs of AIDev v4, a text filter and codebook coding by language models and by the authors select 1,262 pe...

Zhen-Yu Qi, Haotang Li, Jin-Fu Chen et al. · 0 citations

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