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kotlin-language-patterns

Generate idiomatic Kotlin code with null-safety and stdlib patterns.

Updated Apr 9, 2026
Search Tags:#patterns#collections#null-safety#kotlin#extensions#idiomatic#interop
One-click install
npx skills add https://github.com/ririnto/sinon --skill kotlin-language-patterns
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: kotlin-language-patterns
Source: https://github.com/ririnto/sinon/tree/main/plugins/kotlin/skills/kotlin-language-patterns
Command: npx skills add https://github.com/ririnto/sinon --skill kotlin-language-patterns

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Kotlin codebases often struggle to maintain idiomatic Kotlin practices, leading to boilerplate, unsafe null handling, and opaque public APIs.

Core Features & Use Cases

  • Guides null-safety, type-shape selection, extension placement, and collection handling to produce robust APIs.
  • Provides best-practice patterns across Kotlin-native boundaries, interop with Java, and standard-library usage.
  • Helps teams decide when to use value classes, data classes, or sealed types for clear domain modeling.

Quick Start

Provide a concise Kotlin snippet that demonstrates idiomatic patterns following this guide.

Frequently Asked Questions about kotlin-language-patterns

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I write idiomatic Kotlin for null-safety and collection handling?▼

Idiomatic Kotlin applies explicit nullability, type-shape decisions, and stdlib best-practice patterns to ensure robust APIs and minimal boilerplate. It guides safe null handling and proper collection selection across JVM and Kotlin-native boundaries.

What's the best way to choose between data classes, sealed types, and value classes in Kotlin?▼

Kotlin domain modeling selects value classes, data classes, or sealed types based on required type-shape decisions. This ensures clear public API surface contracts, stable member ordering, and explicit boundaries for serialization and filesystem paths.

How do I reduce boilerplate when designing Kotlin APIs for JVM interop?▼

Kotlin API design minimizes boilerplate by applying stdlib best-practice patterns and clear Kotlin-native boundaries. It ensures explicit nullability and stable member ordering across JVM and Kotlin-native boundaries for robust library implementation.

When should I use extension functions for Kotlin library implementation?▼

Kotlin extension placement is determined by type-shape decisions and clear surface contracts. Extensions are applied across API design and library implementation to maintain explicit nullability and minimal boilerplate without opaque public APIs.

Can I use Kotlin-native boundaries for serialization and date-time handling?▼

Kotlin-native boundaries provide clear surface contracts for serialization, date-time, and filesystem paths. Applying explicit nullability and stdlib best-practice patterns across these boundaries ensures robust and clean Kotlin code.

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