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kmp-data-layer

Standardizes Kotlin Multiplatform data-layer patterns with Arrow Either boundaries.

1|Updated Nov 26, 2025
Search Tags:#testing#kotlin#error-handling#multiplatform#repository-pattern#arrow-either#dto-mapping
One-click install
npx skills add https://github.com/niltsiar/kotlin_multiplatform_pokedex --skill kmp-data-layer
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: kmp-data-layer
Source: https://github.com/niltsiar/kotlin_multiplatform_pokedex/tree/main/.agents/kmp-data-layer
Command: npx skills add https://github.com/niltsiar/kotlin_multiplatform_pokedex --skill kmp-data-layer

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Standardizes Kotlin Multiplatform data-layer patterns by enforcing Arrow Either boundaries at repository boundaries.

Core Features & Use Cases

  • Provides a clear interface between API services and domain models using Either<RepoError, T> across repositories.
  • Includes DTO-to-domain mapping patterns and centralized error handling that map API/IO exceptions to a sealed RepoError hierarchy.
  • Supports testing patterns and documentation references to ensure consistent data-layer implementations across features.

Quick Start

Create a Kotlin Multiplatform data-layer skeleton with Arrow Either error boundaries and DTO-to-domain mapping.

Frequently Asked Questions about kmp-data-layer

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

FAQPage Schema
How do I standardize error handling in a Kotlin Multiplatform data layer?▼

Standardize Kotlin Multiplatform data layers by enforcing Arrow Either boundaries at repository interfaces, mapping API and IO exceptions into a centralized sealed RepoError hierarchy for consistent error handling.

What is the best way to map DTOs to domain models in KMP repositories?▼

Mapping DTOs to domain models in KMP repositories is handled through standardized patterns that return Either<RepoError, T>, ensuring type-safe conversions and clear separation between API services and domain layers.

How do I test Kotlin Multiplatform repositories that use Arrow Either?▼

Test Kotlin Multiplatform repositories using Either boundaries by applying provided testing patterns with Kotest and MockK to validate error hierarchies and DTO-to-domain mapping logic.

Can I use Arrow Either for offline-first architecture in Kotlin Multiplatform?▼

Arrow Either repository boundaries in Kotlin Multiplatform support offline-first considerations by consistently wrapping data operations and mapping IO exceptions into sealed RepoError types for reliable failure handling.

Does this KMP data layer approach require a specific error hierarchy structure?▼

Yes, implementing this KMP data layer pattern requires a clear RepoError sealed class hierarchy to properly map API and IO exceptions at the repository boundary using Arrow Either.

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