Regression Testing

Purpose

Ensure that new code changes do not break existing functionality through effective test selection, suite design, automation maintenance, and metric-driven optimization. This skill covers impact analysis, risk-based selection, prioritization, flaky test management, and CI integration.

Agent Protocol

Trigger

User mentions regression testing, test selection, regression suite, flaky tests, automation maintenance, or asks what to re-test after a change.

Input Context

• Code changes (commits, PRs, commits since last regression run)
• Existing test suite composition and execution history
• Risk assessment of changed areas
• Time/resource constraints for regression execution