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Hi! I was wondering how other people handle sharing internal code across modules without leaking it to the public API. I'm currently working on a Gradle plugin, and I have constants that are shared between multiple modules but I'd rather not have exposed to the end user.

I wish there was a way to have something akin to the `internal` modifier but with the possibility to scope to multiple modules. I figure it's probably a niche request so I was wondering how other people have handled the situation.

We have `@ApolloInternal` (<https://github.com/apollographql/apollo-kotlin/blob/7668a302eb5c62ca1d3e423ccfefa1142acee1f4/libraries/apollo-annotations/src/commonMain/kotlin/com/apollographql/apollo/annotations/ApolloInternal.kt#L5|code>). It's not bullet proof but it's something.

Another solution is to tinker with `-Xfriend-path`  to have your modules access each other's `internal` symbols (<https://www.liutikas.net/2025/01/12/Kotlin-Library-Friends.html|blog post>)

Beware in that last case that all the libs are aligned. If not you risk binary incompatibilities if you change some internal symbols

<https://youtrack.jetbrains.com/issue/KT-62688|https://youtrack.jetbrains.com/issue/KT-62688>

(Interstingly, Swift has <https://github.com/swiftlang/swift-evolution/blob/main/proposals/0386-package-access-modifier.md|package modifier> for this)