Rails Boundary Analysis

Analyze coupling and boundary violations between Rails layers.

Boundary Layers

┌─────────────────────────────────────┐
│  Controllers / Grape Endpoints      │  ← HTTP transport only
├─────────────────────────────────────┤
│  Services / Commands / Interactors  │  ← Business logic
├─────────────────────────────────────┤
│  Queries / Policies / Forms         │  ← Specialized concerns
├─────────────────────────────────────┤
│  Models                             │  ← Data + simple scopes
├─────────────────────────────────────┤
│  Jobs / Mailers / External APIs     │  ← Async / external
└─────────────────────────────────────┘