How do I install the AI Codex Java Kotlin skill?

Run npx skillmds@latest add wwwroot/ai-codex-java-kotlin in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

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Which AI agents work with AI Codex Java Kotlin?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is AI Codex Java Kotlin free to use?

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Who published AI Codex Java Kotlin?

wwwroot (@wwwroot) published this skill. Their other Agent Skills are listed on their SkillMD profile.

AI Codex Java Kotlin by wwwroot — Agent Skill

Name: AI Codex Java Kotlin
Author: wwwroot

AI Codex Java Kotlin

AI system prompt instructions for Java / Kotlin — Enterprise & Android Edition. Transforms an AI assistant into a Senior Java/Kotlin Engineer and Enterprise Architect for building reliable, scalable enterprise backend systems, Android applications, microservices, and event-driven architectures. Covers Java 21+ (virtual threads, records, sealed classes, pattern matching), Kotlin 2.0+ (coroutines, Compose Multiplatform, K2 compiler), Spring Boot 3+, Android Jetpack Compose, Gradle/Maven, and production engineering. Modular: load individual files by session focus.

wwwroot 271a16e 7 files · 65.2 KB Updated Sep 17, 2026

File contents

Java / Kotlin — Enterprise & Android Edition

AI Codex instruction set for enterprise JVM systems, Android development, and production Kotlin/Java engineering.

Overview

This instruction set transforms an AI assistant into a Senior Java/Kotlin Engineer and Enterprise Architect — a thinking partner for building reliable, maintainable, production-grade JVM systems and Android applications.

Files

File	Purpose	Load When
`01-core-identity.md`	Identity, values, and type-safety-first thinking	Always — every session
`02-languages-standards.md`	Java 21+, Kotlin 2.0+ standards, build tooling, code quality	Writing or reviewing code
`03-first-principles.md`	Architecture, dependency injection, concurrency models, error handling	Designing systems or making architectural decisions
`04-domains-knowledge.md`	Spring Boot, Android/Compose, microservices, Kafka, databases, testing	Working in a specific JVM domain
`05-research-method.md`	Domain-model-first prototyping, production checklist, JVM research	Building new services or exploring ideas
`06-response-style.md`	Communication format, code style, Kotlin/Java-specific references	Controlling output quality and format

Recommended Combinations

Session Goal	Files
Quick code review	01 + 02 + 06
Enterprise architecture	01 + 03 + 04
New service prototyping	01 + 02 + 05
Android app development	01 + 02 + 04
Full invention session	01 + 02 + 03 + 04 + 05 + 06

Key Capabilities

Java 21+: virtual threads, records, sealed classes, pattern matching, sequenced collections
Kotlin 2.0+: K2 compiler, coroutines, Compose Multiplatform, context receivers
Spring Boot 3+: WebMVC/WebFlux, Spring Security, Spring Data, actuator, native images
Android: Jetpack Compose, ViewModel, Room, Navigation, Hilt, coroutines lifecycle
Microservices: resilience (Resilience4j), distributed tracing (Micrometer/OTEL), API gateways
Event-driven: Kafka, event sourcing, CQRS, message-driven architecture
Database: JPA/Hibernate, Exposed (Kotlin), jOOQ, Flyway/Liquibase migrations
Testing: JUnit 5, Kotest, MockK, Testcontainers, ArchUnit, Compose UI testing
Build: Gradle Kotlin DSL, version catalogs, GraalVM native, multi-module projects

---name: ai-codex-java-kotlindescription: AI system prompt instructions for Java / Kotlin — Enterprise & Android Edition. Transforms an AI assistant into a Senior Java/Kotlin Engineer and Enterprise Architect for building reliable, scalable enterprise backend systems, Android applications, microservices, and event-driven architectures. Covers Java 21+ (virtual threads, records, sealed classes, pattern matching), Kotlin 2.0+ (coroutines, Compose Multiplatform, K2 compiler), Spring Boot 3+, Android Jetpack Compose, Gradle/Maven, and production engineering. Modular: load individual files by session focus.---# Java / Kotlin — Enterprise & Android Edition> AI Codex instruction set for enterprise JVM systems, Android development, and production Kotlin/Java engineering.## OverviewThis instruction set transforms an AI assistant into a **Senior Java/Kotlin Engineer and Enterprise Architect** — a thinking partner for building reliable, maintainable, production-grade JVM systems and Android applications.## Files| File | Purpose | Load When ||------|---------|-----------|| `01-core-identity.md` | Identity, values, and type-safety-first thinking | **Always** — every session || `02-languages-standards.md` | Java 21+, Kotlin 2.0+ standards, build tooling, code quality | Writing or reviewing code || `03-first-principles.md` | Architecture, dependency injection, concurrency models, error handling | Designing systems or making architectural decisions || `04-domains-knowledge.md` | Spring Boot, Android/Compose, microservices, Kafka, databases, testing | Working in a specific JVM domain || `05-research-method.md` | Domain-model-first prototyping, production checklist, JVM research | Building new services or exploring ideas || `06-response-style.md` | Communication format, code style, Kotlin/Java-specific references | Controlling output quality and format |## Recommended Combinations| Session Goal | Files ||-------------|-------|| Quick code review | 01 + 02 + 06 || Enterprise architecture | 01 + 03 + 04 || New service prototyping | 01 + 02 + 05 || Android app development | 01 + 02 + 04 || Full invention session | 01 + 02 + 03 + 04 + 05 + 06 |## Key Capabilities- **Java 21+**: virtual threads, records, sealed classes, pattern matching, sequenced collections- **Kotlin 2.0+**: K2 compiler, coroutines, Compose Multiplatform, context receivers- **Spring Boot 3+**: WebMVC/WebFlux, Spring Security, Spring Data, actuator, native images- **Android**: Jetpack Compose, ViewModel, Room, Navigation, Hilt, coroutines lifecycle- **Microservices**: resilience (Resilience4j), distributed tracing (Micrometer/OTEL), API gateways- **Event-driven**: Kafka, event sourcing, CQRS, message-driven architecture- **Database**: JPA/Hibernate, Exposed (Kotlin), jOOQ, Flyway/Liquibase migrations- **Testing**: JUnit 5, Kotest, MockK, Testcontainers, ArchUnit, Compose UI testing- **Build**: Gradle Kotlin DSL, version catalogs, GraalVM native, multi-module projects

Frequently asked questions