Agent Skills: 5-Whys Root Cause Analysis

This skill should be used when the user asks to "find the root cause", "找根因", "为什么会出现这个问题", "why did this happen", "debug this issue", "排查问题", "analyze this bug", "分析这个bug", "what's causing this", "问题出在哪", "dig deeper", "深挖原因", or needs to systematically trace a problem back to its fundamental cause rather than just addressing symptoms.