Refactor Migrate

Upgrade dependencies, replace deprecated APIs, and adapt to new framework or runtime versions — applicable to any language or project.

Detailed rules live in:

• rules/dependency-upgrade.md
• rules/api-replacement.md
• rules/compatibility.md

Core Principle

A migration changes external interfaces (library calls, runtime behavior) while keeping the application's observable business behavior intact. Every step must be verifiable independently.

When To Use

Use this skill when the task involves: