Prompt Regression Tester Systematically test prompt changes to prevent regressions. Test Case Format Comparison Framework Stability Metrics Breakage Analysis Fix Suggestions Report Generation Best Practices - Test with diverse inputs - Compare across multiple runs (LLMs are stochastic) - Track metrics over time - Automate in CI/CD - Review all regressions before deploy - Maintain test case library Output Checklist - [ ] Test cases defined (30+) - [ ] Comparison runner - [ ] Stability metrics - [ ] Breakage analyzer - [ ] Fix suggestions - [ ] Diff visualizer - [ ] Automated report - [ ] CI in…