Gradle

The API is consumed from a local SDK repository. Publishing writes only to java/build/sdk-repository and does not publish anything publicly.

Publish the SDK locally

In the engine's java/ directory:

gradle --offline --no-daemon :api:publishApiPublicationToSdkRepository

Plugin build file

Use compileOnly, because the runtime provides the API. The path below is the one the template uses; adjust it to where your project lives.

plugins { `java-library` }

group = "dev.example"
version = "1.0.0"

java {
    toolchain {
        languageVersion.set(JavaLanguageVersion.of(25))
        vendor.set(JvmVendorSpec.ADOPTIUM)
    }
}

tasks.withType<JavaCompile>().configureEach { options.release.set(25) }

repositories { maven { url = uri("../java/build/sdk-repository") } }

dependencies { compileOnly("dev.zernyth:api:0.8.0") }

Never shade the Zernyth API into your JAR. The runtime rejects duplicate core classes.