---
since: 0.6.0
---

# Architecture

## Architectural layers

```text
┌────────────────────────────────────────────┐
│ Presentation / API                        │
│ routes / views / serializers / schemas    │
└──────────────────────┬─────────────────────┘
                       │
                       ▼
┌────────────────────────────────────────────┐
│ Application / Domain                       │
│ issue lifecycle / project rules / auth     │
└──────────────────────┬─────────────────────┘
                       │
                       ▼
┌────────────────────────────────────────────┐
│ Persistence                                │
│ models / repositories / queries             │
└──────────────────────┬─────────────────────┘
                       │
                       ▼
                    Database
```

The repository's concrete modules should remain the source of truth for exact
module ownership.