Gives Claude a structured approach to refactoring based on Martin Fowler's catalog and Clean Code principles. You get 43 rules across 8 categories, from critical structure issues like extracting long methods to micro-refactorings like removing dead code. Each rule has a priority level and prefix, so you can focus on high impact changes first. The categorization is solid: structure, coupling, naming, conditionals, patterns, data organization, error handling, and micro-refactoring. Most useful when you're dealing with legacy code, reviewing PRs, or trying to reduce complexity systematically. It's prescriptive in a good way, with specific triggers like "decompose conditional" or "reduce coupling" that map directly to cataloged techniques.
npx skills add https://github.com/pproenca/dot-skills --skill refactor