Flutter Feature-Based Clean Architecture

Feature-Based Clean Architecture

Priority: P0 (CRITICAL)

Standard for modular Clean Architecture organized by business features in lib/​features/.

Structure

lib/
├── features/ <feature_name>/
│   ├── domain/ # Business Logic (Pure Dart): entities, interfaces, use_cases
│   ├── data/ # Implementation: data_sources, dtos, repositories
│   └── presentation/ # UI & State: blocs, pages, widgets
├── core/ # Shared infrastructure & utilities
└── shared/ # Common UI components & shared entities

Implementation Guidelines

• Feature Encapsulation: Keep logic, models, and UI internal to the feature directory.
• Strict Layering: Maintain 3-layer separation (Domain/​Data/​Presentation) within each feature.
• Dependency Rule: Presentation -> Domain <- Data. Domain must have zero external dependencies.
• Cross-Feature Communication: Features only depend on the Domain layer of other features.
• Flat features: Keep lib/​features/ flat; avoid nested features.
• No DTO Leakage: Never expose DTOs or Data Sources to UI or other features; return Domain Entities.
• Shared logic: Move cross-cutting concerns to lib/​shared/ or lib/​core/.

Reference & Examples

For feature folder blueprints and cross-layer dependency templates: See references/​REFERENCE.md.

Related Topics

layer-based-clean-architecture | retrofit-networking | go-router-navigation | bloc-state-management | dependency-injection