Individual skill

postmortem

Explain why a change, incident or session went as it did, separating proven causes from coincidence. Use when: asked for a postmortem, retro or root-cause write-up.

skills/postmortem/SKILL.md

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# Postmortem

Answer an explicit retrospective causal question about a completed or stopped
goal, session, change or incident from its actual intent, outcome and judgment evidence.
Neighbours: how a plan not yet run could fail is [Premortem](../premortem/SKILL.md);
whether a finished change meets acceptance is [Validate](../validate/SKILL.md).

## First check: correlation or cause?

Treat every causal statement as a hypothesis, including the one the caller
arrives with. Promoting a claim from correlation to cause requires all three:

- a stated mechanism: the specific path by which the condition produced the
  outcome, in terms a reader could check against the subject;