Optimize Flutter widget rebuilds, memory usage, rendering, and scrolling performance. Use when diagnosing jank, reducing rebuilds, or improving list performance—not performance tests, monitoring setup, or API optimization.
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const widgets and buildWhen / select for granular updates.ListView.builder for item recycling.compute() or Isolates for parsing/logic.RepaintBoundary for complex animations. Use debugRepaintRainbowEnabled to debug.CachedNetworkImage + memCacheWidth. precachePicture for SVGs.ValueKey for list items and stable IDs for reconciliation.dispose().build methods free of heavy work; move logic to BLoC/Application.maxWidth/maxHeight when loading images.setState(): Use BlocBuilder with buildWhen or context.select() for granular updatesbuild(): Move sorting/filtering/heavy logic to BLoC or compute()const Leaf Nodes: Apply const to all static widgets to skip unnecessary reconciliationColumn Lists: Use ListView.builder for efficient item recycling in large listsBlocBuilder<UserBloc, UserState>(
buildWhen: (p, c) => p.id != c.id,
builder: (context, state) => Text(state.name),
)
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Upgrade an Android project to Android Gradle Plugin (AGP) 9. Use when migrating to AGP 9, updating Gradle build files, migrating to built-in Kotlin, or adopting the new AGP DSL.
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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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Implement WorkManager and background processing correctly on Android. Use when creating Worker classes, scheduling tasks, choosing between WorkManager and Foreground Services, or setting up Hilt in workers; defer FCM and notification delivery to android-notifications.
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Build high-performance declarative UI with Jetpack Compose. Use when writing Composable functions, optimizing recomposition, hoisting state, or working with LazyColumn and side effects; defer deep-link and navigation routing to android-navigation.
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Migrate an Android XML View to Jetpack Compose following a structured 10-step workflow. Use when converting XML layouts to Compose, setting up Compose in an existing View-based project, or incrementally adopting Compose.
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Write correct coroutine scopes, lifecycle collection, and dispatcher injection in Android production code. Use for suspend functions, coroutine scopes, and dispatcher mechanics; defer ViewModel StateFlow/LiveData architecture, Fragment lifecycle recipes, persistence/notifications, and unit-test recipes to their specific skills.
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