Regression Prevention

Overview

This skill defines how to prevent regressions - bugs introduced by changes that break previously working functionality. Systematic regression prevention saves time, maintains quality, and builds confidence in changes.

When to Use

• Before modifying any existing code, configuration, or process
• Before upgrading dependencies, libraries, or frameworks
• Before deploying changes that affect shared components or APIs
• After fixing a bug (prevent it from coming back)
• Don't use when: Working on entirely new code with no existing dependencies

Core Procedures