What problem does it solve? Debugging often devolves into random guesswork and unverified fixes. This Skill enforces a structured, scientific debugging cycle so errors are reproduced, root-caused, and fixed with verifiable evidence instead of trial and error. ## Core Features & Use Cases - Structured Debugging Cycle: Follows the REPRODUCE → UNDERSTAND → ISOLATE → HYPOTHESIZE → TEST → FIX → REFLECT loop with templates for reproduction reports and hypothesis tables. - Root Cause Analysis Tools: Includes the 5 Whys technique and git bisect binary search to locate the exact commit that introduced a regression. - Three-Phase Workflow: Covers incident triage, root cause analysis, and resolution with post-mortem checkpoints including TDD verification. - Use Case: When a login feature breaks in production, use this Skill to reproduce the error, run git bisect to find the offending commit, rank hypotheses by probability, and ship a minimal verified fix with a regression test. ## Quick Start Use the debugging methodology skill to systematically diagnose why the login endpoint returns a 401 error and produce a verified fix.