Ivaylo Ivanov upgraded core Cloud Foundry CPI components by implementing API version 3 migrations and enhancing configuration management in the cloudfoundry/bosh and cloudfoundry/bosh-aws-cpi-release repositories. He refactored YAML tag parsing and improved runtime configuration handling, ensuring tests and continuous integration pipelines reflected the new API structure. In parallel, Ivaylo updated AWS stemcell AMI tagging workflows to align with API changes, using Ruby and YAML to maintain accuracy and reliability. His work focused on stabilizing unit tests and refining CI outcomes, reducing upgrade risk and laying a robust foundation for future enhancements in cloud infrastructure and API development.