Skills for Real Engineers. Straight from my .agents directory.
post-mortem
Agent skill fromthananon/9arm-skills
Write the canonical engineering record of a fixed bug — root cause, mechanism, fix, validation, and how it slipped through. Engineer-audience, code identifiers welcome. Use after a debug session lands a fix, before closing the ticket. Trigger on /post-mortem, when the user says "write the post-mortem / postmortem / RCA / root cause analysis", "document this fix", "write up the root cause", "close out this bug with a writeup", or hands you a fixed-and-validated bug and asks for the writeup.
How to install post-mortem
npx skills add thananon/9arm-skills# or add only this skill to Claude Code: copy the folder
skills/engineering/post-mortem/
# into
~/.claude/skills/post-mortem/ (all projects)
.claude/skills/post-mortem/ (one project)
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