hoangnguyen0403/android-architecture
skills/android/android-architecture/SKILL.md
Apply Clean Architecture layering, modularization, and Unidirectional Data Flow in Android projects. Use when setting up project structure, placing code in layers, configuring feature/core modules, or implementing UDF patterns; defer Compose state and ViewModel/StateFlow implementation to their specific skills.
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SKILL.md
- name:
- android-architecture
- description:
- Apply Clean Architecture layering, modularization, and Unidirectional Data Flow in Android projects. Use when setting up project structure, placing code in layers, configuring feature/core modules, or implementing UDF patterns; defer Compose state and ViewModel/StateFlow implementation to their specific skills.
Android Architecture Standards
Priority: P0 (CRITICAL)
1. Layer Your Project (Clean Architecture)
- Domain: Pure Kotlin (No Android deps). Contains UseCases and Models.
- Data: Repository impl, DataSources (API/DB). Maps DTO -> Domain.
- UI: ViewModel + Composable. Maps Domain -> UiState.
See structure & examples for Clean Architecture layer examples.
2. Modularize by Feature and Core
- Feature Modules:
:feature:home,:feature:profile. - Core Modules:
:core:ui(Design System),:core:network,:core:database. - App Module: DI Root and Navigation Guard.
See structure & examples for module configuration.
3. Enforce Unidirectional Data Flow (UDF)
- Events: UI -> ViewModel (user actions flow UP).
- State: ViewModel -> UI (
StateFlow<UiState>flows DOWN).
4. Verify Jetpack Compose Integration
- Hosting: Use
setContentin Activity (No XML Layouts). - State: Hoist state to ViewModel using
collectAsStateWithLifecycle. - Recomposition: Ensure Composable parameters
@Stableor@Immutable. - Navigation: Use Compose Navigation with Type-Safe destinations.
Anti-Patterns
- No Logic in Activity: Host Navigation only.
- No Repo in UI: Access data exclusively via ViewModel.
- No Context in Domain: Keep Logic Pure.
Verification
- [ ] Domain layer has zero Android framework imports.
- [ ] Each feature module compiles independently.
- [ ] State flows one-way: Events UP, State DOWN.
- [ ]
./gradlew buildsucceeds.
References
- Structure & Examples
- Jetpack Compose Best Practices
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