incident-postmortem

incident-postmortem is a skill for Claude Code from johnqtcg/awesome-skills. It costs 98 tokens per session (5,682 once invoked), scanned A, original, MIT.

A guide for writing incident post-mortems, which are factual records of what went wrong, why it happened, and how to prevent a repeat.

In plain words
What is it for?
Use it to write or review post-mortems, extract event timelines, perform root-cause analysis, classify incidents, and create action items.
Why use it?
It gives teams a structured way to build timelines, find contributing causes, assess severity, and track follow-up work without blaming individuals.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it to write or review post-mortems, extract event timelines, perform root-cause analysis, classify incidents, and create action items.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/johnqtcg/awesome-skills/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.

Any agent
npx skills add johnqtcg/awesome-skills --skill incident-postmortem
Clone the repo
git clone --depth 1 https://github.com/johnqtcg/awesome-skills

Made for: Claude Code.

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/skills/johnqtcg/awesome-skills/incident-postmortem/github.svg)](https://agentmods.dev/skills/johnqtcg/awesome-skills/incident-postmortem)
Your own site
<a href="https://agentmods.dev/skills/johnqtcg/awesome-skills/incident-postmortem"><img src="https://agentmods.dev/badge/skills/johnqtcg/awesome-skills/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/skills/johnqtcg/awesome-skills/incident-postmortem"><img src="https://agentmods.dev/badge/skills/johnqtcg/awesome-skills/incident-postmortem.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 98 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,682 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00098 $0.05682
Opus 5 $0.00049 $0.02841
Sonnet 5 $0.00020 $0.01136
Haiku 4.5 $0.00010 $0.00568

Measured 12d ago against content hash 4c5ae8033c9e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, 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.

The scan reads SKILL.md. This mod also ships 9 executable files (scripts/grade_postmortem_eval.py, scripts/lint_postmortem.py, scripts/run_live_eval.sh, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/incident-postmortem/SKILL.md · 487 lines

How it starts

The opening of the file, as written. The whole thing — 487 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Quick Reference

When you need... Jump to
Write a post-mortem from scratch §2 Gates -> §5 Checklist -> §9 Output
Extract timeline from logs/events §5.1 Timeline Construction
Perform root cause analysis §5.2 Root Cause Analysis
Classify incident severity §6 Severity Classification
Generate action items §5.4 Action Items
Review an existing post-mortem §2 Gates -> §5 Checklist -> §8 Scorecard
Know which sections your output needs §9.0 Required Sections by Mode
Redact before sharing / set distribution §2 Gate 5 Sensitive Data & Distribution
Choose an RCA technique other than 5-Why §5.2 item 5 -> rca-techniques.md §0

1 Scope

In scope: blameless post-mortem writing, timeline extraction from logs/alerts/chat/ monitoring, root cause analysis (5-Why, fishbone, fault tree), severity classification, action items with ownership and deadlines, contributing-factor identification, detection/response gap analysis, post-mortem review and quality scoring.

Out of scope: live incident response / on-call procedures (use runbooks), debugging code to find the root cause (use systematic-debugging), monitoring setup (use monitoring-alerting), infrastructure provisioning, customer communication drafting (PR/comms team scope).

Language: write the post-mortem in the language the user is using. The linter's section, source, owner/deadline, category and N/A patterns are bilingual (English and Chinese, including full-width () and ), so a Chinese post-mortem passes the same gates. Other languages are not yet aliased — a German or Japanese document will be mis-reported as missing sections; lint it in English or add the aliases first.

Read the full file on GitHub · 487 lines

Files

What ships with it

40 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 First seen · 487 lines · 98 tokens per session scan A 4c5ae8033c9e

Subscribe to this mod's changes

incident-postmortem is a skill published in the GitHub repository johnqtcg/awesome-skills (30 stars, last pushed yesterday), licensed MIT. It adds 98 tokens to every session and 5,682 once invoked, about $0.0005 per session on Opus 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 2026-08-30.

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