# Kotlin

> Kotlin

- Skill: `neuralblitz/kotlin-5` (Agent Skill)
- Install (CLI): `npx skillmds@latest add neuralblitz/kotlin-5`
- Raw SKILL.md: https://api.skillmd.com/api/skills/neuralblitz/kotlin-5/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: NeuralBlitz (https://skillmd.com/u/neuralblitz)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/neuralblitz/kotlin-5

---

# Kotlin

Kotlin is a modern, statically typed programming language that runs on the JVM and can compile to JavaScript and native code. JetBrains developed it to be concise, safe, and interoperable with Java.

## Key Concepts

- Null safety
- Data classes
- Extension functions
- Coroutines for async
- Smart casts

## Common Use Cases

- Android development
- Server-side with Ktor/Spring
- Multiplatform mobile
- Desktop applications
- Web development (JS target)

## Best Practices

- Prefer val over var
- Use data classes for POJOs
- Leverage coroutines for concurrency
- Follow official coding conventions
- Use Kotlin Android Extensions

## Resources

- Kotlin Docs: kotlinlang.org/docs
- Android Dev: developer.android.com/kotlin
- Related Skills: android, spring-boot, coroutines