Worked on the terraform-google-modules/terraform-google-pubsub repository to enhance topic name validation within metadata.display.yaml, focusing on compatibility with Go’s RE2 regular expression engine. Developed a feature that broadened the range of valid topic names while maintaining strict character and length constraints and ensuring names do not begin with 'goog'. The solution involved updating YAML configuration and applying advanced regular expression techniques to align with RE2’s syntax, reducing the risk of runtime validation errors. This work improved the reliability and usability of Pub/Sub topic deployments, supporting configuration management best practices without introducing breaking changes for existing users.