# Keep Kotlin Multiplatform bindings at the platform boundary

DevFeed: [Keep Kotlin Multiplatform bindings at the platform boundary](<https://devfeed.tech/articles/keep-kotlin-multiplatform-bindings-at-the-platform-boundary-23964.md>)

Original publisher: [Read original article](<https://cloud-inject.io/notes/kotlin-multiplatform-module-boundaries/>)

Published: 2026-08-18T00:00:00Z

Content type: tutorial

Language: en

Sources: [Koin - Cloud-Inject.io -Kotzilla](<https://devfeed.tech/sources/koin-cloud-inject-io-kotzilla.md>)

Topics: [Kotlin Multiplatform](<https://devfeed.tech/topics/kotlin-multiplatform.md>), [Kotlin](<https://devfeed.tech/topics/kotlin.md>), [implementation](<https://devfeed.tech/topics/implementation.md>), [modules](<https://devfeed.tech/topics/modules.md>), [configuration](<https://devfeed.tech/topics/configuration.md>), [test](<https://devfeed.tech/topics/test.md>)

Tags: [configuration](<https://devfeed.tech/tags/configuration.md>), [implementation](<https://devfeed.tech/tags/implementation.md>), [kotlin](<https://devfeed.tech/tags/kotlin.md>), [kotlin-multiplatform](<https://devfeed.tech/tags/kotlin-multiplatform.md>), [module](<https://devfeed.tech/tags/module.md>), [multiplatform](<https://devfeed.tech/tags/multiplatform.md>), [test](<https://devfeed.tech/tags/test.md>), [verification](<https://devfeed.tech/tags/verification.md>)

## AI overview

A guide to keeping Kotlin Multiplatform dependency bindings at platform boundaries. It recommends defining small capability interfaces in common code, implementing them in platform source sets, organizing modules around capabilities and product features, and testing both shared contracts and real platform bindings.

## Source excerpt

Kotlin Multiplatform makes source-set boundaries visible, but a dependency container can blur them again. A shared module should state a capability such as secure storage, HTTP transport, or local time. The platform source set should supply the implementation. Put contracts where consumers can see them Define the smallest useful interface in common code. Avoid copying a platform API into that interface. A storage contract might expose read, write, and remove; it does not need to expose Android preferences or an Apple keychain type.