Worked on the spinnaker/spinnaker repository to enhance cross-account Pub/Sub queue handling by introducing a skipQueueBootstrap flag, replacing the previous enableQueueCreationFallback mechanism. This update ensures that, in cross-account deployments, only the queue URL is resolved without attempting to create or subscribe to queues, reducing errors and improving deployment resilience. The implementation involved refactoring utility functions for greater reliability and making getQueueUrl public and pure. Comprehensive unit tests were updated and expanded to cover both bootstrap and cross-account scenarios. The work leveraged AWS, backend development, and pub/sub messaging skills, using Groovy and Java to deliver robust, testable improvements.