root-cause-analysis

对失败/回归做无责根因分析并提出可落地的系统杠杆改进。

在故障或回归后做无责（blameless）的根因分析，解释为何发生、为何逃过控制，并提出能长期防止复发的系统级改进。适合事故复盘、near-miss 或产出错误后需要把事件转为制度改进时使用。与单纯修 bug 不同，侧重找出最小且持久的系统杠杆，按影响分层（L0/L1/L2）给出可落地的措施。

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name: root-cause-analysis
description: Blameless root-cause analysis that produces durable system levers, not blame or one-off patches. Use AFTER a failure/regression/wrong-output/near-miss when you need to explain why it existed AND why it escaped controls, then land the smallest system change that prevents recurrence. Tiered L0/L1/L2 by impact. Distinct from debug-loop (which fixes the live bug); this is what debug-loop's report step and the recursive-retrospective §8 delegate to. Agent-invoked (no dedicated command); the design is optimized for agent use: structured tiered (L0/L1/L2) output, primarily reached by delegation from debug-loop, recursive-retrospective, and the RCA agents;