Modern JavaScript (ES2022+) patterns for clean, maintainable code. Use when working with modern JavaScript features like optional chaining, nullish coalescing, or ESM.
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Arrow Functions for callbacks/inlines; Function Declaration for core logic.Template Literals (backticks) for interpolation and multi-line strings.map, filter, and reduce over imperative for loops.#private class fields for encapsulation.new Error() with descriptive messages; never throw strings.==: Strict ===.new Object(): Use literals {}.See references/REFERENCE.md for modern syntax, async patterns, private fields, and functional programming examples.
best-practices | tooling
When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:
ESM import/export
No Callbacks
No var
Nullish ??
Optional Chain ?.
async/await
const default
let if needed
user?.profile?.name
Additional task-grounded exact anchors: try/catch
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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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