incident-commander

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---
name: "incident-commander"
description: "Comprehensive incident response framework from detection through resolution and post-incident review. Battle-tested SRE/DevOps practices: severity classification, timeline reconstruction, structured post-incident analysis. Use when declaring an incident, coordinating multi-team response during an outage, leading a post-mortem, or setting up on-call practices for a new service."
---

# Incident Commander Skill

**Category:** Engineering Team  
**Tier:** POWERFUL  
**Author:** Claude Skills Team  
**Version:** 1.0.0  
**Last Updated:** February 2026

## Overview

Incident response framework for **availability/reliability incidents** (outages, degradations, failed deploys): severity classification, timeline reconstruction, and post-incident review.

**This is NOT security incident triage.** For security events (ransomware, intrusion, data exfiltration, IOC analysis, NIST SP 800-61 forensics), route to `incident-response`. Both skills use SEV1-SEV4 labels; this one scores operational impact (users, revenue, SLA), while `incident-response` classifies attack types and forensic handling.

## Key Features

- **Automated Severity Classification** - Intelligent incident triage based on impact and urgency metrics
- **Timeline Reconstruction** - Transform scattered logs and events into coherent incident narratives
- **Post-Incident Review Generation** - Structured PIRs with multiple RCA frameworks
- **Communication Templates** - Pre-built templates for stakeholder updates and escalations
- **Runbook Integration** - Generate actionable runbooks from incident patterns

## Skills Included

### Core Tools

1. **Incident Classifier** (`incident_classifier.py`)
   - Analyzes incident descriptions and outputs severity levels
   - Recommends response teams and initial actions
   - Generates communication templates based on severity

2. **Timeline Reconstructor** (`timeline_reconstructor.py`)
   - Processes timestamped events from multiple sources
   - Reconstructs chronological incident timeline
   - Identifies gaps and provides duration analysis

3. **PIR Generator** (`pir_generator.py`)
   - Creates comprehensive Post-Incident Review documents
   - Applies multiple RCA frameworks (5 Whys, Fishbone, Timeline)
   - Generates actionable follow-up items

## Incident Response Framework

### Severity Classification System

#### SEV1 - Critical Outage
**Definition:** Complete service failure affecting all users or critical business functions

**Characteristics:**
- Customer-facing services completely unavailable
- Data loss or corruption affecting users
- Security breaches with customer data exposure
- Revenue-generating systems down
- SLA violations with financial penalties

**Response Requirements:**
- Immediate escalation to on-call engineer
- Incident Commander assigned within 5 minutes
- Executive notification within 15 minutes
- Public status page update within 15 minutes
- War room established
- All hands on deck if needed

**Communication Frequency:** Every 15 minutes until resolution

#### SEV2 - Major Impact
**Definition:** Significant degradation affecting subset of users or non-critical functions

**Characteristics:**
- Partial service degradation (>25% of users affected)
- Performance issues causing user frustration
- Non-critical features unavailable
- Internal tools impacting productivity
- Data inconsistencies not affecting user experience

**Response Requirements:**
- On-call engineer response within 15 minutes
- Incident Commander assigned within 30 minutes
- Status page update within 30 minutes
- Stakeholder notification within 1 hour
- Regular team updates

**Communication Frequency:** Every 30 minutes during active response

#### SEV3 - Minor Impact
**Definition:** Limited impact with workarounds available

**Characteristics:**
- Single feature or component affected
- <25% of users impacted
- Workarounds available
- Performance degradation not significantly impacting UX
- Non-urgent mon