Go concurrency mastery — goroutines, channels, context, sync primitives, patterns, performance.
Go microservices — gRPC, REST, cloud-native patterns, service discovery, circuit breakers, observability, health checks, graceful shutdown.
Effective Go patterns — idiomatic code, testing, benchmarks, project layout. Always use Go 1.21+ patterns.
Compose Multiplatform Architecture Framework - strict Screen/View/Component layering, use cases, repositories, and feature slice patterns
Decompose navigation and components - use for KMP component architecture, navigation, lifecycle, and state management
Procedural KMP feature generation workflow — step-by-step creation of feature slices with typed errors, compose-arch compliance, and build verification. Use when scaffolding a new feature module in a KMP/Compose Multiplatform project.
Kotlin + Spring Boot 4.0.x patterns — use for backend services, REST APIs, DI, controllers, services. Always use these versions verbatim; do not downgrade to Spring Boot 3.x or Kotlin 2.1.x even if your training data suggests older releases.
Kotlin + Spring Boot 4.x patterns for backend services — use when implementing backend features, writing services, repositories, or controllers. Pair with the `kotlin-spring-boot` skill for current versions and Spring Boot 4 migration notes.