I am developing an Android library, i use some dependencies in the project module which is published to a local maven repo, this is how i declare my dependencies in my gradle.build.kts:

    dependencies {

    // Retrofit
    implementation(libs.retrofit)
    implementation(libs.retrofit.gson)
    implementation(libs.okhttp)
    implementation(libs.okhttp.logging)

    // room
    implementation(libs.room.runtime)
    implementation(libs.room.ktx)
    ksp(libs.room.compiler)
    testImplementation(libs.room.testing)

    // Work Manager
    implementation(libs.work.runtime.ktx)

    // Play services
    implementation(libs.play.services.location)

    // DI
    implementation(libs.koin.android)
}

my publishing section i straight forward:

publishing {
    publications {
        create<MavenPublication>("release") {
            artifact("$buildDir/outputs/aar/${project.name}-release.aar")
            groupId = "com.mylibrary.android"
            artifactId = "core"
            version = project.extra["baseVersionName"] as String
        }
    }
    repositories {
        maven {
            url = uri("${project.buildDir}/repo")
        }
    }
}

I run ./gradlew assembleRelease, than ./gradlew publish and get an AAR file in a local location.

However, when i try to use this SDK in a sample app, using the line

implementation("com.mylibrary.android:core:0.3.1")

I get errors for java.lang.NoClassDefFoundError: Failed resolution of: on my dependencies, as my sample app dont, nor do i want it to, declare any dependencies in its gradle file.

I have seen solutions for using api instead of implementation however this did not change the error.

I have seen talk of fat-aar but i am not sure that is the correct approach, does anyone know what is the right approach to have dependencies in a library that can be published with it? should they be published with it at all?