debug-investigator

Systematic debugging framework: symptom capture, evidence analysis, hypothesis generation, bisection strategy, log analysis, instrumentation, and minimal reproduction design. Transforms ad-hoc debugging into structured investigation with ranked hypotheses and concrete investigation plans. Triggers on: "debug this", "why is this failing", "root cause", "investigate", "diagnose", "this error", "this exception", "this stacktrace", "not working", "broken", "unexpected behavior", "bisect", "narrow down", "isolate the issue", "help me debug". Use this skill when confronted with a bug, error, or unexpected behavior in any codebase.