{"id":"2604.27488","title":"Skills-Coach: A Self-Evolving Skill Optimizer via Training-Free GRPO","url":"https://codeofpaper.com/paper/2604.27488","arxiv_url":"https://arxiv.org/abs/2604.27488","published":"2026-04-30","code":"none","best":null,"most_starred_community":null,"implementations":[],"possible_matches":0}