HoangNguyen0403.

android-agp-upgrade

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.

android-architecture

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.

android-background-work

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.

android-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.

android-compose-migration

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.

android-concurrency

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.

android-deployment

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.

android-design-system

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

android-di

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.

android-edge-to-edge

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+.

android-legacy-navigation

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.

android-legacy-security

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

android-legacy-state

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

android-navigation

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

android-navigation-3

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.

android-navigation-type-safe

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

android-networking

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

android-notifications

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

android-performance

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.

android-persistence

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.

android-resources

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

android-security

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

android-state

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.

android-testing

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.

android-tooling

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.

android-xml-views

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

angular-architecture

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

angular-components

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.

angular-dependency-injection

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

angular-directives-pipes

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

angular-forms

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.

angular-http-client

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

angular-performance

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

angular-routing

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.

angular-rxjs-interop

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

angular-security

Harden Angular apps against XSS, CSP violations, and unauthorized access. Use when implementing XSS protection, Content Security Policy, or auth guards in Angular.

angular-ssr

Implement Angular SSR with hydration, TransferState caching, and per-route render modes. Use when configuring Angular Universal SSR, client hydration, static prerendering, or preventing double-fetching.

angular-state-management

Implement application state with Angular Signals, computed derivations, and NgRx Signal Store. Use when implementing reactive state with signal(), computed(), effect(), or @ngrx/signals in Angular.

angular-style-guide

Naming conventions, file structure, and coding standards for Angular projects. Use when naming Angular files, organizing project structure, or following Angular style guide.

angular-testing

Write Angular component tests using TestBed, ComponentHarness, and HttpTestingController with proper signal input handling. Use when writing component tests, mocking HTTP calls, or testing signal inputs.

angular-tooling

Angular CLI usage, code generation, build configuration, and bundle optimization. Use when creating Angular projects, generating components/services/guards, configuring builds, running tests, or analyzing bundles.

battle-test

Deep audit of a skills directory against the Skill Creator standard. Produces a scored report and phased remediation plan.

brainstorm-feature

Clarify a rough product or engineering idea into a BRD-lite brief (Why) with measurable business value.

caveman-commit

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caveman-compress

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caveman-review

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codebase-review

Review an entire codebase against framework best practices and generate a prioritized improvement plan.

common-accessibility

Enforce WCAG 2.2 AA compliance with semantic HTML, ARIA roles, keyboard navigation, and color contrast standards for web UIs. Use when building interactive components, adding form labels, fixing focus traps, or auditing a11y compliance.

common-api-design

Apply REST API conventions — HTTP semantics, status codes, versioning, pagination, and OpenAPI standards for any framework. Use when designing endpoints, choosing HTTP methods, implementing pagination, or writing OpenAPI specs.

common-architecture-audit

Audit structural debt, logic leakage, and monolithic components across Web, Mobile, and Backend codebases. Use when reviewing architecture, assessing tech debt, detecting logic in wrong layers, or identifying God classes.

common-architecture-diagramming

Standards for creating clear, audience-appropriate C4 and UML architecture diagrams with Mermaid. Use when producing system context diagrams, container views, sequence diagrams, or updating ARCHITECTURE.md files.

common-best-practices

Enforce SOLID principles, guard-clause style, function size limits, and intention-revealing naming across all languages. Use when refactoring for readability, applying clean-code patterns, reviewing naming conventions, or reducing function complexity.

common-business-requirements

Standardize BRD and BRD-lite discovery for business goals, stakeholder impact, current-to-future state, and measurable value outcomes. Use when creating BRD, business case, project justification, ROI narrative, or AS-IS to TO-BE scope.

common-code-review

Conduct high-quality, persona-driven code reviews. Use when reviewing PRs, critiquing code quality, or analyzing changes for team feedback.

common-context-optimization

Maximize context window efficiency, reduce latency, and prevent lost-in-middle issues through strategic masking and compaction. Use when token budgets are tight, tool outputs flood the context, conversations drift from intent, or latency spikes from cache misses.

common-dast-tooling

Standardize dynamic application security testing for backend APIs, frontend web apps, and mobile clients. Covers ZAP, Nuclei, Nikto, sqlmap, ffuf, browser automation, mobile proxy interception, and AI-driven curl probes. Use when advising on or running dynamic security scans on local/staging environments.

common-debugging

Troubleshoot systematically using the Scientific Method. Use when debugging crashes, tracing errors, diagnosing unexpected behavior, or investigating exceptions.

common-documentation

Write effective code comments, READMEs, and technical documentation following intent-first principles. Use when adding comments, writing docstrings, creating READMEs, or updating any documentation.

common-error-handling

Cross-cutting standards for error design, response shapes, error codes, and boundary placement across API, domain, and infrastructure layers. Use when defining error hierarchies, wrapping exceptions, building standardized error responses, or placing error boundaries in layered architectures.

common-exploit-verification

Enforce "No Exploit, No Report" policy with PoC construction standards, false-positive filtering, and evidence collection per vulnerability class across backend, frontend, and mobile. Use when validating security findings, constructing exploit proofs, filtering false positives, or writing pentest findings.

common-feedback-reporter

Pre-write skill violation audit. Checks planned code against loaded skill anti-patterns before any file write. Use when writing Flutter/Dart code, editing SKILL.md files, or generating any code where project skills are active. Load as composite alongside other skills. When a violation is detected and Auto-fixed: YES, also load +common/common-learning-log to record the mistake.

common-git-collaboration

Enforce version control best practices for commits, branching, pull requests, and repository security. Use when writing commits, creating branches, merging, or opening pull requests.

common-learning-log

Append a structured learning entry to AGENTS_LEARNING.md whenever an AI agent makes a mistake. Auto-activates as a composite skill when: a pre-write skill violation is detected and auto-fixed, or when the session retrospective finds a correction loop. Also triggers directly when the user corrects the AI mid-session. Use when: mistake, wrong, redo, that's not right, correction, my bad, fix that error, I made a mistake, agent error, learning log, log mistake, AGENTS_LEARNING.md

common-llm-security

OWASP LLM Top 10 (2025) audit checklist for AI applications, agent tools, RAG pipelines, and prompt construction. Use when performing any security review touching LLM client code, prompt templates, agent tools, or vector stores.

common-mobile-animation

Apply motion design principles for mobile apps covering timing curves, transitions, gestures, and performance-conscious animations. Use when implementing screen transitions, gesture-driven interactions, shared-element animations, or optimizing animation frame rates on iOS, Android, or Flutter.

common-mobile-ux-core

Enforce universal mobile UX principles for touch-first interfaces including touch targets, safe areas, and mobile-specific interaction patterns. Use when building mobile screens, handling touch interactions, or validating safe area compliance.

common-mobile-visual-testing

Standardizes mobile UI audits, RTL verification, and state-specific testing on iOS/Android.

common-observability

Enforce structured JSON logging, OpenTelemetry distributed tracing, and RED metrics across backend services. Use when adding request correlation, setting up tracing spans, defining SLO burn-rate alerts, or instrumenting middleware.

common-owasp

OWASP Top 10 audit checklists for Web Applications (2021), APIs (2023), and Mobile (2024). Use when performing any security review, PR review, or codebase audit touching web, mobile, or API code.

common-pentest-methodology

PTES-aligned penetration testing methodology for backend, frontend, and mobile. Provides attack taxonomy, exploit techniques per vulnerability class, and platform-specific test matrices. Use when executing pentest workflow, planning security assessments, mapping attack surfaces, or building threat models.

common-performance-engineering

Enforce universal standards for high-performance development. Use when profiling bottlenecks, reducing latency, fixing memory leaks, improving throughput, or optimizing algorithm complexity in any language.

common-product-requirements

Standardize PRD discovery and drafting for product scope, user outcomes, requirement IDs, and acceptance criteria. Use when creating PRD, product requirements, feature specification, or acceptance criteria plan.

common-protocol-enforcement

Enforce Red-Team verification and adversarial protocol audit. Use when verifying tasks, performing self-scans, or checking for protocol violations. Load as composite for all sessions.

common-security-audit

Probe for hardcoded secrets, injection surfaces, unguarded routes, business logic flaws, and platform-specific weaknesses across backend (Node, Go, Java, Python, Rust), frontend (React, Angular, Vue), and mobile (iOS, Android, Flutter) codebases. Use when performing security audits, vulnerability scans, secrets detection, or penetration testing.

common-security-standards

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.

common-session-retrospective

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.

common-skill-creator

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.

common-software-requirements

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.

common-store-changelog

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.

common-system-design

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.

common-tdd

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.

common-telemetry

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.

common-ui-design

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).

common-web-visual-testing

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

common-workflow-writing

Rules for writing concise, token-efficient workflow and skill files. Prevents over-building that requires costly optimization passes. Use when creating or editing workflow files, SKILL.md files, or new skill definitions.

dart-best-practices

Dart code quality conventions: naming, const/final/var hierarchy, single quotes, trailing commas, collection idioms, tear-offs, and import organization. Use when writing new Dart code or reviewing for style violations — wrong import style, global variables, var misuse, anonymous lambdas where tear-offs fit, or missing trailing commas.

dart-language

Dart 3.x language feature standards: null safety, records, sealed classes, switch pattern matching, extensions, and async/await. Use when using !, ?., ??, late, sealed classes, record types, switch expressions, or async patterns — and before introducing any new Dart 3.x construct to confirm the modern idiomatic approach.

dart-tooling

Dart static analysis, linting, formatting, and code-generation standards. Use when touching analysis_options.yaml, running build_runner, configuring dart format line length, setting up DCM metrics, or adding pre-commit hooks via lefthook — and whenever a CI job fails on analyze or format steps.

database-mongodb

Apply expert schema design, indexing, and performance rules for MongoDB. Use when designing MongoDB schemas, creating indexes, or optimizing NoSQL query performance.

database-postgresql

Enforce repository patterns, zero-downtime migrations, and indexing standards for PostgreSQL with TypeORM or Prisma. Use when defining entities, writing migrations, adding RLS policies, or optimizing query performance.

database-redis

Optimize Redis caching, key management, and performance. Use when implementing Redis caching strategies, managing key namespaces, or optimizing Redis performance.

deploy-release

Prepare and verify a staged or production deployment with rollback and smoke checks.

design-solution

Turn an approved PRD or implementation goal into SRS/FRS technical requirements (How), architecture, contracts, and verification decisions.

dev-fix

Unified developer workflow for fixing bugs. Analyzes issue-tracker context, cross-checks docs/code, proposes a solution, implements the fix, verifies locally, and delivers a PR/MR.

flutter-auto-route-navigation

Implement typed routing, nested routes, and guards using auto_route in Flutter. Use when adding navigation flows, nested routes, or route guards with auto_route.

flutter-bloc-state-management

Implement BLoC/Cubit state management correctly in Flutter. Use when writing, modifying, reviewing, or testing any BLoC, Cubit, state, or event file.

flutter-cicd

Set up CI/CD pipelines for Flutter apps. Use when configuring automated testing, build, or deployment workflows with GitHub Actions or Fastlane.

flutter-concurrency

Execute long-running tasks in background isolates to keep the UI responsive. Use when performing heavy computations, parsing large datasets, or choosing between async/await and isolates.

flutter-dependency-injection

Configure service locator setup using injectable and get_it in Flutter. Use when wiring dependency injection with get_it or injectable.

flutter-design-system

Enforce Design Language System adherence in Flutter. Use when implementing design tokens, preventing hardcoded colors/spacing, or building a DLS.

flutter-error-handling

Implement functional error recovery with Either/Failure patterns in Flutter. Use when writing repositories, handling exceptions, or using dartz Either types.

flutter-feature-based-clean-architecture

Organize Flutter apps with modular feature-based clean architecture. Use when creating features under lib/features/ with domain, data, and presentation layers.

flutter-getx-navigation

Implement context-less navigation, named routes, and middleware using GetX. Use when building navigation with GetX routing in Flutter.

flutter-getx-state-management

Implement reactive state with GetX controllers and observables in Flutter. Use when managing state with GetxController, Obx, or reactive observables.

flutter-go-router-navigation

Implement typed routes, redirection, and guards using go_router in Flutter. Use when building declarative navigation with go_router.

flutter-idiomatic-flutter

Compose modern Flutter layouts and widgets idiomatically. Use when composing widget trees, managing layout constraints, or following idiomatic Flutter patterns.

flutter-layer-based-clean-architecture

Enforce inward dependency flow, pure domain layers, and DTO-to-entity mapping in Flutter DDD architecture. Use when structuring domain, infrastructure, application, or presentation layers.

flutter-localization

Add multi-language support using easy_localization with CSV or JSON assets. Use when implementing localization or translations in Flutter.

flutter-navigation

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

flutter-notifications

Integrate push and local notifications using FCM and flutter_local_notifications. Use when adding push or local notification support to Flutter apps.

flutter-performance

Optimize Flutter widget rebuilds, memory usage, and rendering performance. Use when diagnosing jank, reducing rebuilds, or improving list performance.

flutter-retrofit-networking

Build type-safe HTTP networking with Dio and Retrofit including auth interceptors in Flutter. Use when integrating REST APIs with Dio or Retrofit.

flutter-riverpod-state-management

Implement reactive state management using Riverpod 2.0 with code generation in Flutter. Use when defining providers, building AsyncNotifiers, or overriding providers in tests.

flutter-security

Enforce OWASP Mobile security standards for Flutter apps. Use when storing sensitive data, making network calls, handling tokens/PII, or preparing release builds.

flutter-testing

Write unit, widget, and integration tests with robot patterns, widget keys, and Patrol in Flutter. Use when writing tests or implementing test automation.

flutter-widgets

Build maintainable Flutter UI components with composition and theming. Use when building, refactoring, or reviewing widget implementations.

golang-api-server

Build HTTP services, REST APIs, and middleware in Go. Use when building Go HTTP servers, REST APIs, or custom middleware.

golang-architecture

Structure Go projects with Clean Architecture and standard layout conventions. Use when structuring Go projects or applying Clean Architecture in Go.

golang-configuration

Load and validate application configuration from environment variables and config files. Use when managing Go application config with environment variables or viper.

golang-language

Core idioms, style guides, and best practices for writing idiomatic Go code. Use when writing Go code following official style guides and idiomatic patterns.

golang-logging

Standards for structured logging and observability in Golang. Use when adding structured logging or tracing to Go services.

golang-tooling

Go developer toolchain — gopls LSP diagnostics, linting, formatting, and vet. Use when setting up Go tooling, running linters, or integrating gopls with Claude Code.

implement-feature

Implement an approved feature plan with fresh-context slices, TDD, evidence, and PR-ready output.

implementation-readiness

Verify BRD-lite, PRD, SRS/FRS, UX, and test prerequisites before implementation starts.

ios-app-lifecycle

Configure AppDelegate, SceneDelegate, deep linking, and background tasks. Use when configuring iOS app lifecycle, deep linking, or background task scheduling.

ios-architecture

Apply MVVM, Coordinators, and Clean Architecture (VIP/VIPER) in iOS apps. Use when applying MVVM, Coordinators, or VIP/VIPER architecture in iOS apps.

ios-dependency-injection

Configure protocol-based DI with property wrappers and Factory/Swinject. Use when setting up dependency injection or factory patterns in iOS.

ios-deployment

Automate provisioning, signing, and deployment with Fastlane. Use when provisioning iOS apps, managing code signing, or automating deployments with Fastlane.

ios-design-system

Enforce design token usage in SwiftUI apps using iOS Human Interface Guidelines. Use when implementing design tokens, colors, or typography in SwiftUI.

ios-navigation

SwiftUI navigation and deep linking using NavigationStack and Universal Links. Use when implementing NavigationStack or Universal Links deep linking in iOS.

ios-notifications

Push notifications for iOS using UserNotifications framework and APNS. Use when integrating APNS push notifications in iOS applications.

ios-performance

Profile and optimize iOS apps with Instruments, memory management, and rendering techniques. Use when profiling iOS apps with Instruments or optimizing memory and rendering.

ios-persistence

Implement local persistence with SwiftData, Core Data, and Keychain. Use when setting up SwiftData models, Core Data stacks, or local persistence in iOS.

ios-security

Secure iOS apps with Keychain, biometrics, and data protection. Use when implementing Keychain storage, Face ID/Touch ID, or data protection in iOS.

ios-state-management

Implement reactive state with Combine, Observation framework, and UDF patterns. Use when implementing state management with Combine, @Observable, or reactive patterns in iOS.

ios-swiftui

Build declarative UI and manage data flow with SwiftUI in iOS. Use when building declarative SwiftUI views or managing data flow with property wrappers.

ios-ui-navigation

Implement UIKit navigation, Auto Layout, and Apple Human Interface Guidelines in iOS. Use when implementing UIKit navigation, Auto Layout constraints, or HIG compliance.

java-best-practices

Apply core Effective Java patterns for robust, maintainable code. Use when applying SOLID principles, choosing between inheritance and composition, refactoring Java code smells, or reviewing class design.

java-concurrency

Implement modern concurrency with Virtual Threads and Structured Concurrency in Java. Use when implementing Java Virtual Threads (Java 21), Structured Concurrency with StructuredTaskScope, CompletableFuture pipelines, or debugging race conditions.

java-language

Modern Java 21+ standards including Records, Pattern Matching, and Virtual Threads. Use when working with Java records, sealed classes, switch expressions, text blocks, Optional, or upgrading from older Java versions.

java-testing

Testing standards using JUnit 5, AssertJ, and Mockito for Java. Use when writing or reviewing Java unit tests, setting up parameterized tests, writing integration tests with Testcontainers, or working with Mockito mocks.

java-tooling

Configure Maven, Gradle, and static analysis for Java projects. Use when setting up Java build tooling, configuring Spotless or Checkstyle, managing JDK versions with sdkman, writing Dockerfiles for Java services, or adding SpotBugs/SonarLint.

JavaScript Best Practices

Idiomatic JavaScript patterns and conventions for maintainable code.

JavaScript Language Patterns

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

JavaScript Tooling

Development tools, linting, and testing for JavaScript projects.

javascript-language

Modern JavaScript (ES2022+) patterns for clean, maintainable code. Use when working with modern JavaScript features like optional chaining, nullish coalescing, or ESM.

kotlin-best-practices

Core patterns for robust Kotlin code including scope functions and backing properties. Use when writing idiomatic Kotlin, choosing between scope functions (let/apply/run/also/with), encapsulating mutable state with backing properties, or exposing read-only collection interfaces.

kotlin-coroutines

Write safe, structured concurrent code with Kotlin Coroutines. Use when writing suspend functions, choosing coroutine scopes, handling cancellation in loops, selecting between StateFlow and SharedFlow, debugging coroutine leaks, or asked why GlobalScope is dangerous.

kotlin-language

Write idiomatic Kotlin 1.9+ with null safety, sealed classes, and expression syntax. Use when working with Kotlin null safety, data classes, sealed interfaces, extension functions, or migrating Java code to Kotlin.

kotlin-tooling

Configure Gradle Kotlin DSL, Version Catalogs, and MockK for Kotlin projects. Use when configuring build.gradle.kts, setting up libs.versions.toml, adding MockK for tests, or choosing between Kotlin-compatible test assertion libraries.

laravel-api

Build REST endpoints with API Resources, Sanctum authentication, and versioned route groups in Laravel. Use when creating JsonResource classes, adding token-based auth, or defining rate-limited API routes.

laravel-architecture

Enforce core architectural standards for scalable Laravel applications. Use when structuring controllers, service layers, action classes, Form Requests, or Service Container bindings in Laravel projects.

laravel-background-processing

Build scalable asynchronous workflows using Queues, Jobs, and Events in Laravel. Use when implementing queued jobs, event-driven workflows, or async processing in Laravel.

laravel-clean-architecture

Implement Domain-Driven Design with typed DTOs, repository interfaces, and single-responsibility Action classes in Laravel. Use when creating domain folders, binding repository contracts in providers, or passing DTOs between layers.

laravel-database-expert

Optimize Laravel queries with subqueries, joinSub, Redis cache-aside patterns, and read/write connection splitting. Use when writing complex joins, implementing Cache::remember with tags, or configuring database read replicas.

laravel-eloquent

Write performant Eloquent queries with eager loading, reusable scopes, and strict lazy-loading prevention in Laravel. Use when defining model relationships, creating query scopes, or processing large datasets with chunk/cursor.

laravel-sessions-middleware

Configure Redis session drivers, register security-header middleware, and prevent session fixation in Laravel. Use when switching session drivers, adding HSTS/CSP headers via middleware, or regenerating sessions after login.

laravel-testing

Write Pest feature tests with RefreshDatabase, mock external services, and create test data with Eloquent Factories in Laravel. Use when adding HTTP tests, configuring SQLite in-memory test database, or mocking payment services.

laravel-tooling

Configure Laravel ecosystem with custom Artisan commands, Vite asset bundling, Pint code styling, and Horizon queue monitoring. Use when creating Artisan commands, migrating from Mix to Vite, or configuring Pint code standards.

nestjs-api-standards

Create standardized API response envelopes, paginated endpoints, and error interceptors in NestJS. Use when implementing response wrappers, pagination DTOs, or global error formats.

nestjs-architecture

Design decoupled, testable NestJS module boundaries with feature, core, and shared modules. Use when structuring module imports, creating feature modules, or enforcing separation of concerns in NestJS.

nestjs-bullmq

Implement BullMQ job workflows in NestJS. Use when building queue processors, redis-throttler, Upstash limits, idle polling, stalled jobs, and retention policies.

nestjs-caching

Implement multi-level caching, invalidation patterns, and stampede protection in NestJS. Use when adding Redis caching layers, configuring cache-manager interceptors, implementing stale-while-revalidate, or preventing cache stampedes in NestJS services.

nestjs-configuration

Environment variables validation and ConfigModule setup. Use when validating environment variables with Joi/Zod or configuring ConfigModule in NestJS.

nestjs-controllers-services

Separate Controllers from Services and build Custom Decorators in NestJS. Use when defining NestJS controllers, services, or custom parameter decorators.

nestjs-database

Implement data access patterns, Scaling, Migrations, and ORM selection in NestJS. Use when implementing TypeORM/Prisma repositories, migrations, or database patterns in NestJS.

nestjs-deployment

Containerize NestJS apps with multi-stage Docker builds, tune Node.js memory, and implement graceful shutdown hooks. Use when writing Dockerfiles, configuring K8s deployments, or adding shutdown hooks for NestJS.

nestjs-documentation

Automate Swagger/OpenAPI documentation and standardize API response schemas in NestJS. Use when generating OpenAPI specs, documenting paginated or generic responses, configuring the Nest CLI Swagger plugin, or publishing versioned API docs.

nestjs-error-handling

Implement Global Exception Filters and standard error formats in NestJS. Use when implementing global exception filters or standardizing error responses in NestJS.

nestjs-file-uploads

Validate and stream file uploads securely with Validation and S3 streaming in NestJS. Use when implementing secure file uploads, validation, or S3 streaming in NestJS.

nestjs-notification

Build dual-write notification services with database persistence and FCM push delivery in NestJS. Use when creating notification entities, sending push via FCM, or implementing in-app notification feeds.

nestjs-observability

Configure structured logging with Pino, Prometheus metrics, and health checks for NestJS services. Use when adding JSON logging, request tracing with correlation IDs, Prometheus metric endpoints, or liveness/readiness health checks.

nestjs-performance

Optimize NestJS throughput with Fastify adapter, singleton scope enforcement, compression, and query projections. Use when switching to Fastify, diagnosing request-scoped bottlenecks, or profiling API overhead.

nestjs-real-time

Implement WebSocket gateways with Socket.io and Server-Sent Events endpoints in NestJS. Use when building chat features, live feeds, or choosing between WebSocket and SSE for real-time communication.

nestjs-scheduling

Implement distributed cron jobs with Redis-based locking and BullMQ offloading in NestJS. Use when adding @Cron scheduled tasks, preventing duplicate runs across pods, or delegating heavy work to queue workers.

nestjs-search

Integrate Elasticsearch and implement search index Sync patterns in NestJS. Use when integrating Elasticsearch or implementing search index sync in NestJS.

nestjs-security

Implement JWT authentication, RBAC guards, Helmet hardening, and Argon2 hashing in NestJS. Use when adding auth strategies, role-based access control, CSRF protection, or security headers.

nestjs-security-isolation

Enforce multi-tenant isolation and PostgreSQL Row Level Security in NestJS. Use when enforcing tenant isolation or PostgreSQL RLS in NestJS multi-tenant apps.

nestjs-testing

Write Unit and E2E tests with Jest, mocking strategies, and database isolation in NestJS. Use when writing NestJS unit tests, E2E tests with supertest, or mock providers.

nestjs-transport

Configure gRPC, RabbitMQ, and monorepo contract patterns for NestJS microservices. Use when setting up gRPC service-to-service calls, RabbitMQ event-driven messaging, shared contract libraries, or microservice exception handling in NestJS.

nextjs-app-router

Configure file-system routing with nested layouts, route groups, parallel routes, and error boundaries in Next.js App Router. Use when creating page routes, adding loading/error states, or organizing routes with groups and dynamic segments.

nextjs-architecture

Structure Next.js projects with Feature-Sliced Design layers, domain-grouped slices, and strict import hierarchy. Use when organizing features into FSD layers, enforcing slice boundaries, or keeping page.tsx thin.

nextjs-authentication

Secure token storage (HttpOnly Cookies) and Middleware patterns. Use when implementing authentication, secure session storage, or auth middleware in Next.js.

nextjs-caching

Configure the 4 caching layers in Next.js: request memoization, data cache, full-route cache, and router cache. Use when setting revalidation strategies, invalidating cached data with tags, or diagnosing stale data bugs.

nextjs-data-access-layer

Build secure, reusable data access patterns with DTOs, taint checks, and colocated authorization in Next.js. Use when centralizing database queries, transforming raw data to DTOs, adding server-only guards, or preventing sensitive data from reaching Client Components.

nextjs-data-fetching

Implement Fetch API, Caching, and Revalidation strategies in Next.js. Use when fetching data, configuring cache behavior, or implementing revalidation in Next.js.

nextjs-i18n

Best practices for multi-language handling, locale routing, and detection strategies across App and Pages Router. Use when adding i18n, locale routing, or language detection in Next.js.

nextjs-optimization

Optimize images, fonts, scripts, and metadata for Next.js performance and Core Web Vitals. Use when configuring next/image for LCP, next/font for zero layout shift, next/script loading strategies, or generateMetadata for SEO.

nextjs-pages-router

Implement Pages Router data fetching with getServerSideProps, getStaticProps, and API routes in Next.js legacy projects. Use when working in a pages/ directory project, adding SSR/SSG data fetching, or creating API routes.

nextjs-rendering

Select and implement SSG, SSR, ISR, Streaming, or Partial Prerendering strategies in Next.js App Router. Use when choosing a rendering mode for a page, configuring generateStaticParams, or enabling PPR.

nextjs-security

Secure Next.js App Router with middleware auth, Server Action validation, CSP headers, and taint APIs. Use when adding authentication middleware, validating Server Action inputs with Zod, or preventing secret leakage to client bundles.

nextjs-server-actions

Implement mutations, forms, and RPC-style calls with Next.js Server Actions. Use when implementing Server Actions, form mutations, or RPC-style data mutations in Next.js.

nextjs-server-components

Build async React Server Components and place 'use client' boundaries at leaf nodes for interactivity in Next.js App Router. Use when deciding RSC vs Client Component, composing server data into client wrappers, or fixing hydration errors.

nextjs-state-management

Apply best practices for managing URL, server, and client state in Next.js applications. Use when choosing between URL params, SWR/TanStack Query, Zustand, or Context for state, or when fixing hydration mismatches from localStorage.

nextjs-styling

Implement zero-runtime CSS with Tailwind, CSS Modules, and the cn() utility for RSC-compatible styling in Next.js. Use when choosing a styling library, creating dynamic class utilities, or optimizing fonts with next/font.

nextjs-testing

Write Jest or Vitest unit tests with React Testing Library and Playwright E2E tests for Next.js projects. Use when testing components with RTL, mocking APIs with MSW, or creating Playwright user flow tests.

nextjs-tooling

Configure Next.js build tooling, deployment, and developer workflow. Use when setting up Turbopack, standalone Docker output, bundle analysis, CI caching, environment variable validation, or ESLint integration for Next.js projects.

nextjs-upgrade

Next.js version migrations using official guides and codemods. Use when migrating a Next.js project to a new major version using codemods.

pentest

PTES-aligned adversarial security audit for backend, frontend, and mobile applications. Produces a CVSS-scored Hacker Report with verified PoCs and phased remediation.

php-best-practices

Write PHP following best practices, PSR standards, and code quality guidelines. Use when writing PHP following PSR standards, SOLID principles, or improving code quality.