共 1 个 Skill，均有经来源核对的实质文档。打开卡片可阅读原始说明，了解包内文件和安装方式。
When writing or reviewing code to eliminate duplicated knowledge and business logic. Use when the user says "this is duplicated," "we have this in two places," "single source of truth," "DRY this up," or "shotgun surgery." For premature abstraction concerns, see yagni.
