Verdict
This skill makes debugging a sequence of evidence-producing gates: reproduce, minimize, hypothesize, instrument, fix, and regression-test. It is a strong antidote to agents editing the first suspicious line and declaring victory.
Best for
Hard regressions, intermittent failures, performance problems, and unfamiliar systems where the cause is not yet demonstrated.
Keep in mind
The full loop is slower than a direct fix for obvious defects and still needs a reproducible signal, useful logs, or a way to add instrumentation.
Example task
Diagnose why checkout latency doubled after the last release without changing production code until the responsible path is isolated.