dig

Cross-domain root-cause diagnosis for bugs, data mismatches, metric anomalies, and recurring problems, found before touching a fix. Use when the user says 查不出原因 / 有时好有时坏 / 数对不上 / 指标掉了 / 为什么又坏了 / 反复出现 / 改了还是不行 / 一直报错 / dig into this / debug this / why does this keep failing. Do not trigger for concept-explanation whys (why-is-the-sky-blue knowledge questions), first-time errors with obvious messages (the error…