postmortem

postmortem is a command for Claude Code from latestaiagents/agent-skills. It costs 18 tokens per session (779 once invoked), scanned A, original, MIT.

A template for a blameless postmortem, a written review of an incident that focuses on causes and improvements rather than personal fault. It organizes the impact, timeline, root-cause analysis, and follow-up actions.

In plain words
What is it for?
Use it after outages or other incidents to document what happened, why it happened, how it was fixed, and what should change.
Why use it?
It turns scattered incident details into a record the team can learn from and use to prevent similar failures.

Command for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the devops-sre plugin — 8 skills, 6 commands shipped together

Good fit Use it after outages or other incidents to document what happened, why it happened, how it was fixed, and what should change.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/latestaiagents/agent-skills/postmortem
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/latestaiagents/agent-skills

Made for: Claude Code.

Or install devops-sre, the plugin that ships this one along with the rest of its 8 skills, 6 commands.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for postmortem

README.md
[![agentmods](https://agentmods.dev/badge/commands/latestaiagents/agent-skills/postmortem/github.svg)](https://agentmods.dev/commands/latestaiagents/agent-skills/postmortem)
Your own site
<a href="https://agentmods.dev/commands/latestaiagents/agent-skills/postmortem"><img src="https://agentmods.dev/badge/commands/latestaiagents/agent-skills/postmortem/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for postmortem

Your own site · 80×15
<a href="https://agentmods.dev/commands/latestaiagents/agent-skills/postmortem"><img src="https://agentmods.dev/badge/commands/latestaiagents/agent-skills/postmortem.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 18 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 779 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00018 $0.00779
Opus 5.5 $0.00007 $0.00312
Sonnet 5.5 $0.00004 $0.00156
Haiku 4.5 $0.00002 $0.00078

Measured 1mo ago against content hash 9889d34aceb1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

postmortem scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/devops-sre/commands/postmortem.md · 124 lines

How it starts

The opening of the file, as written. The whole thing — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/postmortem

Generate a comprehensive, blameless postmortem document following industry best practices.

What I Need

Provide incident details:

  • Incident ID or description
  • Timeline of events (I can pull from Slack/PagerDuty if connected)
  • What was the root cause?
  • What fixed it?

Or just say: /postmortem for yesterday's API outage and I'll gather details.

Generated Document Structure

# Postmortem: [Incident Title]

**Date:** YYYY-MM-DD
**Severity:** SEV-X
**Duration:** X hours Y minutes
**Author:** [Your name]
**Status:** Draft / Final

---

## Executive Summary
[2-3 sentence summary for leadership]

## Impact
- **Users Affected:** X,XXX
- **Revenue Impact:** $X,XXX (estimated)
- **SLA Breach:** Yes/No
- **Customer Notifications:** X sent

## Timeline (All times in UTC)

| Time | Event |
|------|-------|
| HH:MM | First alert fired |
| HH:MM | On-call acknowledged |
| HH:MM | Incident channel created |
| HH:MM | Root cause identified |
| HH:MM | Mitigation deployed |
| HH:MM | Service restored |
| HH:MM | Incident resolved |

## Root Cause Analysis

### What Happened
[Detailed technical explanation]

### Why It Happened (5 Whys)
1. Why did X fail? → Because Y
2. Why did Y happen? → Because Z
3. Why did Z occur? → Because...
4. Why... → Because...
5. Why... → **Root Cause**

### Contributing Factors
- [ ] Recent deployment
- [ ] Configuration change
- [ ] Capacity limits
- [ ] External dependency
- [ ] Missing monitoring
- [ ] Unclear runbook

## What Went Well
- Rapid detection (X minutes)
- Clear communication
- Effective collaboration
- [Other positives]

## What Could Be Improved
- Detection took X minutes (target: Y)
- Runbook was outdated
- Escalation path unclear
- [Other improvements]

## Action Items

| Priority | Action | Owner | Due Date | Ticket |
|----------|--------|-------|----------|--------|
| P0 | [Prevent recurrence] | @name | YYYY-MM-DD | JIRA-XXX |
| P1 | [Improve detection] | @name | YYYY-MM-DD | JIRA-XXX |
| P1 | [Update runbook] | @name | YYYY-MM-DD | JIRA-XXX |
| P2 | [Add monitoring] | @name | YYYY-MM-DD | JIRA-XXX |

## Lessons Learned
[Key takeaways for the team and organization]

---
*This postmortem follows blameless principles. We focus on systems
and processes, not individuals.*

Read the full file on GitHub · 124 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 124 lines · 18 tokens per session scan A 9889d34aceb1

Subscribe to this mod's changes

postmortem is a command published in the GitHub repository latestaiagents/agent-skills (5 stars, last pushed 6mo ago), licensed MIT. It adds 18 tokens to every session and 779 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.