Debug

Systematic debugging session: reproduce the issue, form ranked hypotheses, run targeted experiments, confirm root cause, apply minimal fix, verify, and add a regression guard.

Purpose

Resolve software bugs through a structured scientific method — from symptom collection to root cause confirmation and prevention.

Trigger

Apply when user reports:

• "debug this", "find the bug", "why is this failing", "it's not working"
• "error in", "exception thrown", "crash", "unexpected behavior"
• "help me debug", "track down bug", "investigate issue"
• "幫我 debug", "找 bug", "為什麼會壞", "錯誤訊息", "程式當掉", "追查問題"