Kotlin Skills

Design reproducible build, image, and deployment pipelines for Kotlin plus Spring applications, including CI verification, layered containers, rollout safety,…

Design and diagnose Spring configuration, profiles, and `@ConfigurationProperties` binding for Kotlin applications. Use when property binding fails,…

Diagnose and resolve Gradle and Spring classpath conflicts, version drift, and binary incompatibilities in Kotlin applications. Use when `NoSuchMethodError`,…

Decompose business scope into bounded contexts, module or service boundaries, workflows, and API contracts before implementation begins. Use when shaping a new…

Design and implement consistent API validation and error-handling behavior for Kotlin plus Spring services. Use when defining error payloads, mapping framework…

Generate, debug, and repair Kotlin + Spring Gradle builds with minimal, compatible changes. Use when `build.gradle.kts` or `settings.gradle.kts` is failing,…

Design resilient HTTP, messaging, and scheduled integrations for Kotlin plus Spring services with explicit timeout budgets, retries, idempotency, circuit…

Diagnose and design JSON serialization and deserialization behavior for Kotlin plus Jackson in Spring applications. Use when DTOs fail to deserialize, default…

Migrate Java code to Kotlin in Spring-based codebases without changing behavior, public contracts, framework compatibility, or binary assumptions unless…

Model Kotlin persistence code correctly for Spring Data JPA and Hibernate, including entity design, relationships, fetch plans, repository queries, lazy…

Kotlin's data class is natural for DTOs but dangerous for JPA entities. Hibernate relies on identity semantics that data class breaks: equals / hashCode over all fields corrupts Set / Map membership after state changes, and auto-generated copy() creates detached duplicates of managed entities.

Refactor Kotlin code toward clearer, more idiomatic design without breaking Spring behavior, serialization, persistence, or public contracts. Use when…

Diagnose and prevent Kotlin plus Spring proxy failures around `@Transactional`, `@Cacheable`, `@Async`, method security, retry, configuration proxies, and JPA…

Android Gradle Plugin 9.0 makes the Android application and library plugins incompatible with the Kotlin Multiplatform plugin in the same module. This skill guides you through the migration.

Migrate KMP projects from CocoaPods (kotlin("native.cocoapods")) to Swift Package Manager (swiftPMDependencies DSL) — replaces pod() with swiftPackage(),…

Migrate Kotlin (and Java) code from kotlinx.collections.immutable 0.3.x / 0.4.x to the latest 0.5.x. The 0.5.x line renames every copy-returning method on…

Convert Java source files to idiomatic Kotlin using a disciplined 4-step conversion methodology with 5 invariants checked at each step. Supports framework-aware conversion that handles annotation site targets, library idioms, and API preservation.

Diagnoses and fixes slow Kotlin/Native compilation and linking in Kotlin Multiplatform projects that target iOS. Use when the user reports slow iOS or…

Design actionable observability for Kotlin plus Spring services across logs, metrics, tracing, and health endpoints. Use when instrumenting a service,…

Analyze and improve performance, throughput, latency, and concurrency behavior in Kotlin plus Spring services using real evidence from metrics, traces, SQL,…

Guide production incident response for Kotlin plus Spring services from first alert through mitigation, diagnosis, and follow-up. Use when error rates spike,…

Inspect a Kotlin + Spring repository before making changes or answering implementation, debugging, build, architecture, or review questions. Use when the agent…

Plan safe database schema evolution and zero-downtime change rollout for Kotlin plus Spring systems using Flyway, Liquibase, or equivalent migration tooling.…

Diagnose Spring application context startup failures, bean graph problems, missing or duplicate beans, circular dependencies, conditional auto-configuration…

Review Kotlin + Spring changes for behavioral regressions, transaction and proxy bugs, API and serialization mistakes, persistence risks, security issues,…

Design and generate Kotlin Spring HTTP APIs with correct controller signatures, DTOs, validation, serialization assumptions, error handling, and web tests. Use…

Design and audit Spring Security configurations for Kotlin plus Spring services, including filter chains, JWT or OAuth2 resource server setup, method security,…

Diagnose Kotlin + Spring failures from stack traces, startup logs, runtime logs, and related metric anomalies, then separate root cause from wrapper exceptions…

Design and generate layered Kotlin + Spring tests that balance speed, realism, and regression value across unit, slice, and integration levels. Use when adding…

Design safe transaction boundaries, rollback behavior, idempotency, locking, and consistency strategies for Kotlin + Spring business workflows. Use when a…

Plan and execute risky Spring Boot, Spring Framework, Kotlin, Gradle, JDK, and major dependency upgrades with explicit compatibility checkpoints and rollback…