Mongodb Aggregation Pipeline

---
name: mongodb-aggregation-pipeline
description: "Use when writing MongoDB aggregations."
version: 1.0.0
author: Hermes Agent
license: MIT
metadata:
  hermes:
    tags: ["mongodb", "aggregation", "$lookup", "$unwind", "$group"]
---
# Mongodb Aggregation Pipeline

## When to Use

## Core Content
```python
# Example code
```

## Common Pitfalls

## Verification Checklist
- [ ] Implementation confirmed
- [ ] Edge cases tested
- [ ] Performance acceptable