Retrospective Validation

Validate methodologies with historical data, not live deployment.

When you have 1,000 past errors, you don't need to wait for 1,000 future errors to prove your methodology works.

When to Use This Skill

Use this skill when:

• 📊 Rich historical data: 100+ instances (errors, test failures, performance issues)
• 🎯 Observable patterns: Methodology targets detectable issues
• 🔍 Pattern matching feasible: Clear detection heuristics, measurable false positive rate
• ⚡ High deployment friction: CI/CD integration costly, user studies time-consuming
• 📈 Statistical rigor needed: Want confidence intervals, not just hunches
• ⏰ Time constrained: Need validation in hours, not weeks