Background

iOS ships a single umbrella pod/SPM package, RoktSDKPlus, that bundles the mParticle core SDK, the mParticle Rokt kit, and the Rokt Payment Extension. This PR adds the Android equivalent so partners adopting Rokt Shoppable Ads can depend on one artifact instead of wiring up core + kit + payment extension by hand, with versions guaranteed to be compatible.

The mParticle Rokt kit deliberately does not pull com.rokt:payment-extension (or Stripe) transitively (see #713) — apps that don't need Shoppable Ads stay lightweight. rokt-sdk-plus is the artifact that adds it on top.

What changed

• New rokt-sdk-plus/ module — a thin com.android.library (empty AAR) that api-aggregates android-core, android-rokt-kit, and com.rokt:payment-extension, plus a RoktSdkPlus.VERSION constant. It is an aggregator, not a kit, so it applies the publish convention plugin directly (not com.mparticle.kit).
• Published as com.rokt:rokt-sdk-plus via an isolated settings-rokt-sdk-plus.gradle, so it builds/publishes in its own Gradle invocation with the Rokt Maven Central credentials (separate from the com.mparticle secrets).
• Centralized Rokt versions in root gradle.properties (roktSdkVersion, roktPaymentExtensionVersion); the Rokt kit now reads roktSdkVersion instead of hardcoding it.
• Publish convention plugin gains optional POM url/license overrides (backward-compatible) so the com.rokt artifact carries Rokt branding.
• release-publish.yml — publish the Rokt kit to mavenLocal so the umbrella resolves its mParticle deps locally (avoiding a Maven Central propagation race), then publish the umbrella to Central with the Rokt credentials.

Versioning

The umbrella version tracks the mParticle SDK release line (shared with android-core / android-rokt-kit). The bundled Rokt artifacts (roktsdk / payment-extension) ride their own Rokt line, pinned via the shared gradle.properties properties.

Resulting dependency closure (verified locally)

com.rokt:rokt-sdk-plus
├── com.mparticle:android-core
├── com.mparticle:android-rokt-kit → android-kit-base → android-core, + com.rokt:roktsdk → roktux
└── com.rokt:payment-extension → roktsdk, com.stripe:stripe-android, play-services-wallet

Validation

• :rokt-sdk-plus:publishMavenPublicationToMavenLocal succeeds; POM validation passes; coordinates com.rokt:rokt-sdk-plus (packaging aar), Rokt license/URL, three api deps with the two version lines correct; sources jar + stub javadoc jar + Gradle module metadata produced.
• A throwaway consumer depending only on com.rokt:rokt-sdk-plus resolves the full closure above with no failures.
• Rokt kit still resolves roktsdk via the new property.

⚠️ Required before this can release

1. com.rokt:payment-extension is not yet on Maven Central (zero versions published). The publish step will fail until the ROKT team publishes payment-extension (and a matching roktsdk) to Central. Verified locally against a mavenLocal build of the payment extension.
2. Add the ROKT_* repo secrets (ROKT_MAVEN_CENTRAL_SIGNING_KEY, ROKT_MAVEN_CENTRAL_SIGNING_KEY_PASSWORD, ROKT_SONATYPE_NEXUS_USERNAME, ROKT_SONATYPE_NEXUS_PASSWORD) with verified com.rokt Central Portal namespace access.
3. Coordinate with feat: add Rokt Shoppable Ads support #713 — it adds the kit-side registerPaymentExtension/selectShoppableAds facade referenced in the README and bumps the roktsdk line; expect a one-line merge conflict in kits/rokt/rokt/build.gradle (resolve by keeping the property and bumping gradle.properties).

Note: rokt-sdk-plus is intentionally kept out of the default CI build (pull-request.yml / main settings) because the missing payment-extension on Central would otherwise break CI. It builds only via -c settings-rokt-sdk-plus.gradle.

Notes

• The umbrella ships a single Java metadata class (not Kotlin) to avoid a stdlib-metadata version mismatch — the bundled Rokt artifacts are built with Kotlin 2.2, newer than this repo's compiler. Consumers still receive kotlin-stdlib transitively.
• Version defaults are 6.0.1-rc.1 (the latest roktsdk on Central; rc.2 does not exist).

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