postmortem

Generate structured blameless postmortems with 5 Whys root-cause analysis.

Updated Apr 30, 2026
One-click install
npx skills add https://github.com/jnlanahan/Product-Agents-and-Skills --skill postmortem-jnlanahan
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: postmortem
Source: https://github.com/jnlanahan/Product-Agents-and-Skills/tree/main/skills/7-Learn-Postmortem
Command: npx skills add https://github.com/jnlanahan/Product-Agents-and-Skills --skill postmortem-jnlanahan

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

It helps teams document what happened during a production incident, identify the real underlying causes, and define concrete next steps to prevent recurrence—without turning the review into blame.

Core Features & Use Cases

  • Structured blameless postmortems: Produces an incident timeline, root cause analysis using 5 Whys, contributing factors, and a severity-aware narrative.
  • Action items that actually ship: Requires owners and due dates for every fix tied to root causes or contributing factors.
  • Evidence-driven reconstruction: Guides gathering facts from logs, monitoring, and deployment history to build an accurate UTC timeline.

Quick Start

Use the command /postmortem right after a production incident to generate a saved, structured blameless postmortem with a reconstructed timeline and 5 Whys.

Frequently Asked Questions about postmortem

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I write a blameless postmortem after a production outage?

A blameless postmortem reconstructs the incident timeline in UTC and applies 5 Whys root cause analysis to identify contributing factors without assigning blame. It requires gathering facts from logs and monitoring to build an evidence-driven narrative of the production outage.

How do I perform a 5 Whys root cause analysis for a severe bug or data incident?

Performing 5 Whys root cause analysis for a data incident involves explicitly separating the immediate cause from the underlying root cause. The process reconstructs a minute-by-minute timeline and generates an action-item list with designated owners and deadlines to prevent recurrence.

What is the best way to document contributing factors during an incident review?

The best way to document contributing factors during an incident review is to generate a structured, severity-aware narrative. This approach distinguishes the immediate cause from the root cause and ties each contributing factor to a specific action item with an owner and a due date.

Can I use this RCA process for security exposures and data incidents?

Yes, this RCA process applies to security exposures, data incidents, outage reviews, and severe bugs. It generates a documented root cause analysis by reconstructing the incident timeline and applying 5 Whys to ensure teams have actionable fixes for any production incident.

Do I need a minute-by-minute UTC timeline to generate an incident RCA?

Yes, a minute-by-minute UTC timeline is required to generate an incident RCA. This evidence-driven reconstruction guides the gathering of facts from deployment history and logs to ensure the 5 Whys root cause analysis is based on accurate incident data.

Why do action items in a postmortem need owners and deadlines?

Action items in a postmortem need owners and deadlines to ensure the fixes actually ship. By requiring explicit ownership and due dates for every fix tied to root causes or contributing factors, teams guarantee that the blameless review results in actionable prevention steps.