Java to Kotlin (JetBrains)

Name: Java to Kotlin (JetBrains)
Availability: InStock
Author: Kotlin

Use when converting Java source files to idiomatic Kotlin, when user mentions "java to kotlin", "j2k", "convert java", "migrate java to kotlin", or when working with .java files that need to become…

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Last updated: September 2, 2026

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Quick Start

Install Command

npx skills add Kotlin/kotlin-agent-skills --skill kotlin-tooling-java-to-kotlin

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Tags

kotlin

java

migration

jetbrains

trending-2026-09

What it does. 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.

Before converting, scan the Java file's import statements to detect which frameworks are in use. Load ONLY the matching framework reference files to keep context focused.

Highlights

Attempt to compile the converted file
Check annotation site targets
Confirm no behavioral changes
Kotlin keyword conflicts (
```
when
```
,
```
in
```
,
```
is
```
,
```
object
```
)
SAM conversion ambiguity

When to use it. Use when converting Java source files to idiomatic Kotlin, when user mentions "java to kotlin", "j2k", "convert java", "migrate java to kotlin", or when working with .java files that need to become…

Install

npx skills add Kotlin/kotlin-agent-skills --skill kotlin-tooling-java-to-kotlin

Or copy the skill folder manually:

git clone https://github.com/Kotlin/kotlin-agent-skills.git
cp -r kotlin-agent-skills/skills/kotlin-tooling-java-to-kotlin/ ~/.claude/skills/kotlin-tooling-java-to-kotlin

Source: Kotlin/kotlin-agent-skills — 1,030 stars, Apache-2.0, last pushed 2026-08-24.

Java to Kotlin (JetBrains)

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Quick Start

Install Command

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Tags

GitHub MCP Server

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License

Pal MCP Server

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