Is the Kotlin skill free?

Yes. The skill itself is free from margelo/react-native-skills. SkillProof publishes the install command and an independent test verdict at no cost.

Does Kotlin work with Claude Code?

It is in our test queue — we run every skill on real work before issuing a verdict, and this one is scheduled.

How do I install Kotlin?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Kotlin with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Kotlin

Designs and reviews Kotlin and Android APIs, including Nitro Module implementations.

by margelo · margelo/react-native-skills

In test queue

Install — copy the command Download source ↗

Test report

Verdict: In test queue
Tested: —
Environment: Pending

In the test queue — machine-screened (validator 85/100, 139★ repo), full install/trigger/output test scheduled.

What Kotlin does

Design, implement, and review Kotlin and Android APIs. Use when working on .kt files, Kotlin nullability, sealed classes/interfaces, coroutines, Android threading, Java interop, or Kotlin-backed React Native Nitro Module implementations.

How to install Kotlin

git clone https://github.com/margelo/react-native-skills
cp -r react-native-skills/skills/kotlin ~/.claude/skills/kotlin

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Kotlin

/kotlin Designs and reviews Kotlin and Android APIs, including Nitro Module implementations.

It also activates on plain-language prompts like these:

Review this Kotlin sealed class for nullability issues
Implement the Android side of this Nitro Module in Kotlin
Fix this Java interop issue in our Kotlin coroutine code

Frequently asked questions

Is the Kotlin skill free?: Yes. The skill itself is free from margelo/react-native-skills. SkillProof publishes the install command and an independent test verdict at no cost.
Does Kotlin work with Claude Code?: It is in our test queue — we run every skill on real work before issuing a verdict, and this one is scheduled.
How do I install Kotlin?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Kotlin with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.