> browse/registry

> kotlin-language

Idiomatic Kotlin 1.9+ standards (Null Safety, Expressions, Extensions). Use when working with Kotlin null safety, expression syntax, or extension functions. (triggers: **/*.kt, **/*.kts, val, var, extension, data class, sealed, when)

> android-design-system

Enforce Material Design 3 and design token usage in Jetpack Compose apps. Use when implementing M3 components, color schemes, or design tokens in Android. (triggers: **/*Screen.kt, **/ui/theme/**, **/compose/**, MaterialTheme, Color, Typography, Modifier, Composable)

> firebase-apk-scanner

Scans Android APKs for Firebase security misconfigurations including open databases, storage buckets, authentication issues, and exposed cloud functions. Use when analyzing APK files for Firebase vulnerabilities, performing mobile app security audits, or testing Firebase endpoint security. For authorized security research only.

> java-tooling

Standards for build tools (Maven/Gradle) and static analysis. Use when configuring Maven/Gradle builds or static analysis tools for Java projects. (triggers: pom.xml, build.gradle, build.gradle.kts, build, dependency, plugin, sdk, lint)

> java-21

Java 21 language and runtime patterns for modern, safe code. Trigger: When writing Java 21 code using records, sealed types, or virtual threads.

> spring-boot-3

Spring Boot 3 patterns for configuration, DI, and web services. Trigger: When building or refactoring Spring Boot 3 applications.

> android-clean-architecture

Clean Architecture patterns for Android and Kotlin Multiplatform projects — module structure, dependency rules, UseCases, Repositories, and data layer patterns.

> java-language

Modern Java standards (21+) including Records, Pattern Matching, and Virtual Threads. Use when working with Java 21+ Records, sealed classes, or pattern matching features. (triggers: **/*.java, pom.xml, build.gradle, record, switch, sealed, var, virtual thread, stream, optional)

> azure-communication-chat-java

Build real-time chat applications with Azure Communication Services Chat Java SDK. Use when implementing chat threads, messaging, participants, read receipts, typing notifications, or real-time chat features.

> azure-communication-callautomation-java

Build call automation workflows with Azure Communication Services Call Automation Java SDK. Use when implementing IVR systems, call routing, call recording, DTMF recognition, text-to-speech, or AI-powered call flows.

> azure-identity-java

Azure Identity Java SDK for authentication with Azure services. Use when implementing DefaultAzureCredential, managed identity, service principal, or any Azure authentication pattern in Java applications.

> azure-monitor-opentelemetry-exporter-java

Azure Monitor OpenTelemetry Exporter for Java. Export OpenTelemetry traces, metrics, and logs to Azure Monitor/Application Insights. Triggers: "AzureMonitorExporter java", "opentelemetry azure java", "application insights java otel", "azure monitor tracing java". Note: This package is DEPRECATED. Migrate to azure-monitor-opentelemetry-autoconfigure.

> azure-security-keyvault-keys-java

Azure Key Vault Keys Java SDK for cryptographic key management. Use when creating, managing, or using RSA/EC keys, performing encrypt/decrypt/sign/verify operations, or working with HSM-backed keys.

> azure-security-keyvault-secrets-java

Azure Key Vault Secrets Java SDK for secret management. Use when storing, retrieving, or managing passwords, API keys, connection strings, or other sensitive configuration data.

> app-store-optimization

App Store Optimization (ASO) toolkit for researching keywords, analyzing competitor rankings, generating metadata suggestions, and improving app visibility on Apple App Store and Google Play Store. Use when the user asks about ASO, app store rankings, app metadata, app titles and descriptions, app store listings, app visibility, or mobile app marketing on iOS or Android. Supports keyword research and scoring, competitor keyword analysis, metadata optimization, A/B test planning, launch checklist

> spring-boot-api-design

Standards for OpenAPI, Versioning, and Global Error Handling. Use when designing Spring Boot APIs with OpenAPI specs, versioning, or global error handling. (triggers: **/*Controller.java, openapi, swagger, versioning, problemdetails)

> spring-boot-observability

Standards for Micrometer, Distributed Tracing, and Structured Logging. Use when adding Micrometer metrics, distributed tracing, or structured logging to Spring Boot. (triggers: logback-spring.xml, application.properties, micrometer, tracing, correlation-id, mdc)

> android-reverse-engineering

Decompile Android APK, XAPK, JAR, and AAR files using jadx or Fernflower/Vineflower. Reverse engineer Android apps, extract HTTP API endpoints (Retrofit, OkHttp, Volley), and trace call flows from UI to network layer. Use when the user wants to decompile, analyze, or reverse engineer Android packages, find API endpoints, or follow call flows.

> axiom-swiftui-animation-ref

Use when implementing SwiftUI animations, understanding VectorArithmetic, using @Animatable macro, zoom transitions, UIKit/AppKit animation bridging, choosing between spring and timing curve animations, or debugging animation behavior - comprehensive animation reference from iOS 13 through iOS 26

> java-best-practices

Core engineering principles inspired by Effective Java and Clean Code. Use when applying Effective Java patterns, SOLID principles, or clean code practices in Java. (triggers: **/*.java, refactor, clean code, smells, patterns, design)