This skill should be used when the user mentions "postmortem", "incident", "root cause analysis", "blameless", "severity", "SEV1", "on-call", "RCA", or "outage", or is writing up an incident. It provides a blameless postmortem methodology, a severity model, and reliability metric definitions.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Incident Response and Blameless Postmortems
## Purpose
A consistent, blameless methodology for writing incident postmortems and classifying severity, so writeups drive systemic fixes instead of finger-pointing. This is incident-management domain knowledge (structure, blameless framing, severity, metrics), applied uniformly every time.
## The blameless principle
Analyze **systems and processes, never individuals**. People act rationally given the information and tools they had; if a human error caused harm, the real finding is the missing guardrail that let it. This is not about avoiding accountability, it's that blame suppresses the honest disclosure you need to actually fix the system.
**Reframe every human-error statement:**
| Blameful (reject) | Blameless (use) |
|-------------------|-----------------|
| "X pushed a bad config" | "the change reached prod because no test covered this path" |
| "on-call was slow" | "the alert didn't page; ack took N minutes" |
| "someone ran the wrong command" | "the safe and destructive commands were indistinguishable" |
## Postmortem structure (standard sections)
1. **Summary**: 2-3 sentences: what broke, blast radius, duration.
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The line at the top of this page pins the label git:20260826.571bc2f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_svgafvwm6k3uy5es
GET https://markdownregistry.com/api/v1/resolve?ref=sigistry/marketplace/incident-response
GET https://markdownregistry.com/api/v1/blob/7a59311b7edf4211295e901e18074beb4d7ce7d057af691df2cf8b7dd353fdcb
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