gof-kotlin-idioms

One-line summary

Translate each GoF pattern into idiomatic Kotlin — and, for several patterns, explain when a Kotlin language feature replaces the pattern outright.

When to use this skill

• A GoF pattern has been chosen (via gof-identify) and the target language is Kotlin.
• The user wants idiomatic Kotlin code, not Java-flavored Kotlin.
• A code review asks "is this Kotlin pattern usage idiomatic?".

When NOT to use this skill

• The target language is not Kotlin.
• The user is still picking a pattern → route to gof-identify.
• Framework-specific patterns (Spring, Arrow) — out of scope; future adapter plugins.

Core content

For each pattern: the idiomatic Kotlin construct, and a note when the language supersedes the pattern.