Output Format: Incident Postmortem

Generate a structured incident postmortem document.

Incident Details:
{{incident_summary}}

Timeline:
{{incident_timeline}}

Impact:
{{business_impact}}

OUTPUT FORMAT:
```markdown
# Incident Postmortem: [Title]
## Date: [date] | Severity: [level] | Duration: [time]

### Executive Summary
[2-3 sentence overview]

### Timeline
| Time (UTC) | Event | Actor |
|------------|-------|-------|

### Impact
- Users affected: X
- Revenue impact: $X
- Data loss: Yes/No

### Root Cause
[Detailed technical explanation]

### Contributing Factors
1. [Factor with explanation]

### What Went Well
- [Positive aspect]

### What Went Poorly
- [Issue with context]

### Action Items
| ID | Action | Owner | Priority | Due Date |
|----|--------|-------|----------|----------|

### Lessons Learned
[Key takeaways for the team]
```