Refactor Modernize

Replace legacy patterns and outdated idioms with current language features and conventions — applicable to any language or project.

Detailed rules live in:

• rules/language-features.md
• rules/async-concurrency.md
• rules/idioms.md

Core Principle

Modernization replaces how code expresses its intent, not what it does. The observable behavior stays the same; the implementation moves to current best practice.

When To Use

Use this skill when the task involves: