AI-Powered Test Coverage Gap Analysis: How I Use Claude Code + gstack to Generate Test Cases

Every QA engineer knows the feeling: you're staring at a test suite that covers the happy path, maybe a few edge cases, and you have a nagging suspicion there's a whole category of scenarios nobody's thought to test. Writing those missing tests from scratch is slow, tedious, and mentally expensive. You're essentially doing product archaeology - reverse-engineering what the app actually does so you can describe it in test form. I found a way to automate that archaeology.