Claude Skills by HoangNguyen0403

Enforce universal security protocols for safe, resilient software. Use when implementing authentication, encryption, authorization, input validation, secret management, or any security-sensitive feature across any language or framework.

Analyze conversation corrections to detect skill gaps and auto-improve the skills library. Use after any session with user corrections, rework, or retrospective requests. After finding correction loops, also load +common/common-learning-log to persist mistake entries to AGENTS_LEARNING.md.

Standardizes the creation and evaluation of high-density Agent Skills (Claude, Cursor, Windsurf). Ensures skills achieve high Activation (specificity/completeness) and Implementation (conciseness/actionability) scores. Use when: writing or auditing SKILL.md, improving trigger accuracy, or refactoring skills to reduce redundancy and maximize token ROI.

Standardize SRS and FRS specifications for technical behavior, interfaces, data contracts, quality constraints, and verification mapping. Use when writing SRS, functional specification, system behavior requirements, API/data contracts, or non-functional thresholds.

Generate user-facing release notes for the Apple App Store and Google Play Store by collecting git history, triaging user-impacting changes, and drafting store-compliant changelogs. Enforces character limits (App Store ≤4000, Google Play ≤500), tone, and bullet format. Use when generating release notes, app store changelog, play store release, what's new, or version release notes for any mobile app.

Enforce separation of concerns, dependency inversion, and resilience patterns across layered and distributed architectures. Use when designing new features, evaluating module boundaries, selecting architectural patterns, or resolving scalability bottlenecks.

Implements a strict Red-Green-Refactor loop to ensure zero production code is written without a prior failing test. Use when: creating new features, fixing bugs, or expanding test coverage.

Enforce tracking of token usage, execution metadata, and cost at the end of agent workflows. Use when a workflow concludes, before generating the final handoff or task.md artifact.

Design distinctive, production-grade frontend UI with bold aesthetic choices. Use when building web components, pages, interfaces, dashboards, or applications in any framework (React, Next.js, Angular, Vue, HTML/CSS).

Standardizes visual audits, responsive design, and behavioral testing for web apps.

Idiomatic JavaScript patterns and conventions for maintainable code.

Modern JavaScript (ES2022+) patterns for clean, maintainable code.

Development tools, linting, and testing for JavaScript projects.

Standards for creating new High-Density Agent Skills with optimal token economy.

Implement navigation patterns with go_router, deep linking, and named routes in Flutter. Use when building navigation, deep linking, or routing.

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.

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.

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.

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.

Build high-performance declarative UI with Jetpack Compose. Use when writing Composable functions, optimizing recomposition, hoisting state, or working with LazyColumn and side effects.

Write correct coroutine scopes, Flow collection, and dispatcher injection in Android. Use when writing suspend functions, choosing between StateFlow and SharedFlow, or injecting Dispatchers for testability.

Configure release signing, R8 obfuscation, and App Bundle publishing for Android. Use when setting up signing configs, enabling minification, adding ProGuard keep rules, or preparing for Play Store submission.

Enforce Material Design 3 theming and design token usage in Jetpack Compose. Use when implementing M3 components, color schemes, typography, or design tokens.

Configure Hilt dependency injection with proper scoping, modules, and constructor injection in Android. Use when setting up Hilt DI, defining modules, or configuring component scoping.

Migrate a Jetpack Compose app to edge-to-edge display and fix system bar inset issues. Use when UI components are obscured by navigation/status bars, fixing IME insets, or enabling edge-to-edge for SDK 35+.

Implement Jetpack Navigation Component with XML graphs and SafeArgs for type-safe fragment navigation. Use when working with XML-based navigation or SafeArgs in legacy Android projects.

Harden Intent handling, WebView configuration, and FileProvider access in Android apps. Use when securing Intent extras, configuring WebViews, or exposing files via FileProvider.

Integrate ViewModel state with Views using Coroutines and Lifecycle on Android. Use when managing state with repeatOnLifecycle or lifecycle-aware coroutines in Fragment/Activity.

Install and migrate to Jetpack Navigation 3. Use when implementing Navigation 3 patterns including NavDisplay, NavKey routes, deep links, multiple backstacks, scenes (dialogs, bottom sheets), or migrating from Navigation 2.

Implement type-safe Jetpack Navigation Compose routes using Kotlin serialization. Use when defining navigation graphs with type-safe destinations in Jetpack Compose.

Implement navigation with Jetpack Compose Navigation and App Links on Android. Use when implementing navigation flows, deep links, or backstack handling.

Integrate Retrofit, OkHttp, and Kotlinx Serialization for type-safe API communication in Android. Use when building API clients, adding interceptors, or configuring network security.

Integrate push notifications using Firebase Cloud Messaging and NotificationCompat on Android. Use when setting up FCM, creating notification channels, or handling local notifications.

Optimize Android app startup, UI rendering, and frame stability with Baseline Profiles and lazy initialization. Use when reducing startup time, diagnosing jank, or improving rendering performance.

Implement Room database schemas and DataStore preferences with proper async patterns in Android. Use when defining Room entities, DAOs, migrations, or replacing SharedPreferences with DataStore.

Organize strings, drawables, and localization resources in Android projects. Use when managing Android resources, plurals, or adding multi-language support.

Secure data encryption, network configuration, and permissions in Android apps. Use when handling API keys, auth tokens, certificate pinning, EncryptedSharedPreferences, or securing exported components.

Configure ViewModel state emission with StateFlow, sealed UiState classes, and lifecycle-safe collection in Android. Use when working with ViewModels, UiState patterns, or exposing state to Compose UI.

Write unit tests, Compose UI tests, and Hilt-integrated tests for Android. Use when writing test files or testing ViewModels, Composables, or Repositories with MockK and coroutine test utilities.

Configure static analysis with Detekt, Ktlint, and Android Lint for CI/CD quality gates. Use when adding lint rules, configuring code quality checks, or setting up analysis as a CI gate.

Implement ViewBinding, RecyclerView, and XML layouts correctly on Android. Use when working with XML layouts, ViewBinding, or RecyclerView adapters in legacy Android projects.

Standards for Angular project structure, feature modules, and lazy loading. Use when structuring Angular apps, defining feature modules, or configuring lazy loading.

Build standalone Angular components with Signals inputs, OnPush change detection, Control Flow, and Smart/Dumb patterns. Use when building standalone Angular components, implementing @if/@for control flow, applying OnPush change detection, or implementing Signals in Angular components.

Configure DI, inject() usage, and providers in Angular. Use when configuring Angular dependency injection, using inject(), or defining providers.

Compose HostDirectives and Pure Pipes in Angular. Use when creating attribute directives with HostDirectives or writing pure pipes in Angular.

Build typed reactive forms with strict FormGroup typing, custom validators, and nonNullable controls in Angular. Use when implementing typed reactive forms, custom validators, or form control patterns.

Integrate HttpClient, Interceptors, and API interactions in Angular. Use when integrating HttpClient, writing interceptors, or handling API calls in Angular.

Optimization techniques including OnPush, @defer, and Image Optimization. Use when optimizing Angular rendering, deferring blocks, or improving Core Web Vitals.

Configure Angular Router with lazy-loaded routes, functional guards, and component input binding. Use when defining routes, lazy-loading features, creating route guards, or setting up resolvers.

Bridge Observables and Signals using toSignal and toObservable in Angular. Use when converting between RxJS Observables and Angular Signals.