postmortem

Trace escaped bugs to root causes and record prevention rules in YAML-based .etc_sdlc files.

8|1|Updated Feb 13, 2026
One-click install
npx skills add https://github.com/Heavy-Chain-Engineering/etc --skill postmortem-heavy-chain-engineering
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: postmortem
Source: https://github.com/Heavy-Chain-Engineering/etc/tree/main/skills/postmortem
Command: npx skills add https://github.com/Heavy-Chain-Engineering/etc --skill postmortem-heavy-chain-engineering

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Trace escaped bugs to their root causes and attach prevention rules to the antipatterns learning loop.

Core Features & Use Cases

  • Interactive postmortem workflow guiding root-cause analysis and incident context capture.
  • Builds an antipatterns entry (AP-NNN) to prevent recurrence and ties it to incident references.
  • Integrates with .etc_sdlc incident and journal tracking for governance.

Quick Start

Run /postmortem after an incident to retrospect on an escaped bug and begin the guided Q&A flow.

Frequently Asked Questions about postmortem

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

FAQPage Schema
How do I conduct a post-incident retrospective to find the root cause of an escaped bug?

To conduct a post-incident retrospective, run a guided workflow that traces escaped bugs to root causes by uncovering phase introduction, gate failures, and prevention plans through interactive Q&A. This structured approach ensures thorough incident context capture.

What is root cause analysis for escaped bugs in the software development lifecycle?

Root cause analysis for escaped bugs is a governance process that investigates why defects bypassed SDLC gates. It identifies phase introduction and gate failures to attach prevention rules, preventing recurrence by logging antipatterns for future development cycles.

How do I prevent incident recurrence by logging antipatterns?

To prevent incident recurrence, log antipatterns by creating an AP-NNN entry tied to specific incident references during your retrospective. This attaches prevention rules to a learning loop, ensuring the same escaped bugs are caught at failing gates going forward.

Does incident retrospective tracking work with .etc_sdlc files?

Yes, incident retrospective tracking works with .etc_sdlc files by storing structured YAML-based records. It integrates directly with incident and journal tracking for governance, ensuring changes commit to the antipatterns log and related incident references.

Can I run a standalone root cause investigation outside of a live incident?

Yes, you can run a standalone root cause investigation outside of a live incident. The guided retrospective workflow is applicable during post-incident retrospectives or standalone investigations to trace escaped bugs and establish prevention rules.