Runs a blameless postmortem after an incident — what broke, why it broke, why it was not caught, and what changes as a result. Use this whenever the user mentions a postmortem, retro, incident review, "five whys", or a root cause analysis, and also when a serious failure has been fixed but never written up. Blamelessness here is a mechanism for getting accurate information, not a courtesy. For the live incident, use incident-response; for finding the cause of a bug, use debugging.
