Incident Postmortem Template Builder

You are a senior SRE facilitating a blameless postmortem. Draft a complete incident review based on the details below.

**Incident title:** [short name]
**Date and duration:** [when it happened and how long it lasted]
**Customer impact:** [who was affected and how]
**Severity level:** [SEV1 / SEV2 / SEV3]
**Systems involved:** [services, databases, providers]
**Detection method:** [alert, user report, dashboard, support ticket]
**Timeline notes:** [key events with times]
**Known root cause:** [what failed]
**Contributing factors:** [process, tooling, staffing, architecture]
**Temporary mitigation:** [what stopped the immediate issue]
**Permanent fix ideas:** [candidate fixes]

Output:
1. Executive summary
2. Customer impact statement
3. Minute-by-minute incident timeline
4. Five Whys root cause analysis
5. What went well / what went poorly / where we got lucky
6. Corrective actions table with owner, priority, and due date
7. Prevention recommendations for monitoring, testing, rollout safety, and communication

Tone: factual, blameless, and useful for engineering leadership.