Postmortem Writing

Does the structured work of writing blameless postmortems after incidents. Walks you through building proper timelines, running 5-whys root cause analysis, and turning findings into trackable action items. Includes templates for standard postmortem documents and facilitating the actual postmortem meetings. The blameless culture guidance is solid, focusing on system improvements rather than individual blame. Most helpful when you're dealing with SEV1/SEV2 incidents or trying to establish consistent postmortem practices across your team. Beats starting from scratch every time something breaks.

skills.sh installs: 11.2K
GitHub stars: 42.4K
last updated: Aug 21, 2026

View on GitHub

Install

$ npx -y skills add wshobson/agents --skill postmortem-writing --agent claude-code

Installs into .claude/skills of the current project.

Files

Postmortem Writing

Comprehensive guide to writing effective, blameless postmortems that drive organizational learning and prevent incident recurrence.

When to Use This Skill

Conducting post-incident reviews
Writing postmortem documents
Facilitating blameless postmortem meetings
Identifying root causes and contributing factors
Creating actionable follow-up items
Building organizational learning culture

Core Concepts

1. Blameless Culture

Blame-Focused	Blameless
"Who caused this?"	"What conditions allowed this?"
"Someone made a mistake"	"The system allowed this mistake"
Punish individuals	Improve systems
Hide information	Share learnings
Fear of speaking up	Psychological safety