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tasks/native-business-logic-migration/04-implement-android-data-models.md

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+# 04. Implement Android data models (Kotlin)
+
+meta:
+  id: native-business-logic-migration-04
+  feature: native-business-logic-migration
+  priority: P0
+  depends_on: [native-business-logic-migration-02]
+  tags: [implementation, android, data-models]
+
+objective:
+- Implement all data models in Kotlin following Android conventions
+
+deliverables:
+- FeedItem.kt
+- Feed.kt
+- FeedSubscription.kt
+- SearchResult.kt
+- SearchFilters.kt
+- NotificationPreferences.kt
+- ReadingPreferences.kt
+- Supporting data classes and sealed classes
+
+tests:
+- Unit: Test serialization/deserialization with Moshi/Gson
+- Unit: Test copy() functionality
+- Unit: Test toString() output
+
+acceptance_criteria:
+- All models are data classes
+- All models have proper equals/hashCode
+- JSON serialization working with Moshi
+- Room Entity annotations ready for database models
+- Sealed classes for enum types
+
+validation:
+- Run `./gradlew test`
+- Verify no lint warnings
+
+notes:
+- Use data classes for immutable value objects
+- Use sealed classes for enum-like types
+- Consider using Parcelize for UI passing