# DDD & Event Sourcing Patterns

Review guidance for domain-driven design and event sourcing. Focus on subtle mistakes models make and patterns they get wrong.

## Contents

- `DDD-CHECKLIST.md` - The review checklist covering:
  - Aggregate Design (boundaries, invariants, identity)
  - Event Sourcing (immutability, naming, content, reconstruction)
  - Domain vs Integration Events
  - Eventual Consistency
  - Projections (read models)
  - Snapshotting
  - Process Managers / Sagas
  - Value Objects
  - Anti-Patterns to Flag

## Why This Exists

Models know the textbook definitions but often get the nuances wrong:
- Making aggregates too large (data grouping vs consistency boundary)
- Suggesting "fixes" to immutable events
- Mixing domain and integration events
- Expecting synchronous read model updates
- Snapshotting prematurely

This checklist catches those mistakes.

## Integration

```yaml
# In your review workflow
patterns-repo: rodin/ddd-patterns
patterns-files: '.'
```

## License

MIT