incident-postmortem

incident-postmortem is a command for Claude Code from HermeticOrmus/LibreSecOps-Claude-Code. It costs 40 tokens per session (1,214 once invoked), scanned A, original, MIT.

A command that creates a structured, blameless review after a security incident or near miss. It organizes the timeline, actions, impact, and known root cause into a documented review.

In plain words
What is it for?
Use it after resolving an incident, reviewing a near miss, identifying recurring patterns, or meeting documentation requirements.
Why use it?
It helps teams understand what happened and improve their processes without focusing the review on personal blame.

Command for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Part of the incident-response plugin — 1 skill, 2 commands, 2 agents shipped together

Good fit Use it after resolving an incident, reviewing a near miss, identifying recurring patterns, or meeting documentation requirements.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/hermeticormus/libresecops-claude-code/incident-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/HermeticOrmus/LibreSecOps-Claude-Code

Made for: Claude Code.

Or install incident-response, the plugin that ships this one along with the rest of its 1 skill, 2 commands, 2 agents.

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 incident-postmortem

README.md
[![agentmods](https://agentmods.dev/badge/commands/hermeticormus/libresecops-claude-code/incident-postmortem/github.svg)](https://agentmods.dev/commands/hermeticormus/libresecops-claude-code/incident-postmortem)
Your own site
<a href="https://agentmods.dev/commands/hermeticormus/libresecops-claude-code/incident-postmortem"><img src="https://agentmods.dev/badge/commands/hermeticormus/libresecops-claude-code/incident-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 incident-postmortem

Your own site · 80×15
<a href="https://agentmods.dev/commands/hermeticormus/libresecops-claude-code/incident-postmortem"><img src="https://agentmods.dev/badge/commands/hermeticormus/libresecops-claude-code/incident-postmortem.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,214 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 $0.00040 $0.01214
Opus 5.5 $0.00016 $0.00486
Sonnet 5.5 $0.00008 $0.00243
Haiku 4.5 $0.00004 $0.00121

Measured 12d ago against content hash 059e7aa79302, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

incident-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 12d 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/incident-response/commands/incident-postmortem.md · 167 lines

How it starts

The opening of the file, as written. The whole thing — 167 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/incident-postmortem

Generate a structured blameless post-incident review from incident timeline, actions taken, and outcomes.

Trigger

Use this command when:

  • A security incident has been resolved and is ready for review
  • A near-miss event occurred that warrants analysis
  • Periodic review of past incidents for pattern identification
  • Compliance requirements mandate documented incident reviews

Input

Required:

  • Incident summary: What happened, when, and what was the impact
  • Timeline: Sequence of events from detection through resolution

Optional:

  • Actions taken: What containment, eradication, and recovery steps were performed
  • Root cause: If already determined, the underlying cause
  • Impact metrics: Duration, affected users, data exposure scope, financial impact

Process

Step 1: Timeline Construction

Build a complete, chronological timeline from all available information:

  1. Initial compromise (if known): When the attacker first gained access
  2. Dwell time: Period between compromise and detection
  3. Detection: How and when the incident was first identified
  4. Triage: When severity was classified and response activated
  5. Containment: When spread was stopped
  6. Eradication: When the threat was removed
  7. Recovery: When services were restored
  8. Resolution: When the incident was declared resolved

Key metrics to extract:

  • Mean Time to Detect (MTTD): Time from compromise to detection
  • Mean Time to Respond (MTTR): Time from detection to containment
  • Mean Time to Recover: Time from containment to full service restoration
  • Total incident duration: End-to-end from compromise to resolution

Step 2: Root Cause Analysis

Use the "5 Whys" technique to drill past symptoms to root causes:

  1. Why did the incident occur? (Proximate cause)
  2. Why was that possible? (Contributing factor)
  3. Why wasn't it prevented? (Control failure)
  4. Why didn't we detect it sooner? (Detection gap)
  5. Why wasn't there a faster remediation path? (Process gap)

Read the full file on GitHub · 167 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. 12d ago Changed · +5 lines · +40 tokens per session 059e7aa79302
  2. 1mo ago First seen · 162 lines · 0 tokens per session scan A 01f78be1dfeb

Subscribe to this mod's changes

incident-postmortem is a command published in the GitHub repository HermeticOrmus/LibreSecOps-Claude-Code (4 stars, last pushed 9d ago), licensed MIT. It adds 40 tokens to every session and 1,214 once invoked, about $0.0002 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 2026-09-03.