What problem does it solve? When tests fail, builds break, or runtime behavior goes wrong, developers often guess at fixes or patch symptoms instead of root causes, wasting hours and letting bugs compound. This Skill enforces a disciplined stop-the-line workflow that preserves evidence, reproduces the failure, and fixes the actual cause. ## Core Features & Use Cases - Six-Step Triage Checklist: Reproduce, localize, reduce, fix the root cause, guard with a regression test, and verify end-to-end. - Error-Specific Decision Trees: Dedicated triage flows for test failures, build failures, runtime errors, and non-reproducible bugs (timing, environment, or state dependent). - Safe Fallback Patterns: TypeScript snippets for graceful degradation, safe config defaults, and instrumentation guidelines for intermittent issues. - Use Case: A CI build fails after a refactor. Instead of guessing, you follow the checklist: reproduce locally, use git bisect to find the offending commit, reduce to a minimal failing case, fix the root cause, and add a regression test before resuming feature work. ## Quick Start Help me systematically debug this failing test and find its root cause instead of guessing at a fix.
