Worked on backend and CLI development for the timescale/tiger-cli repository, focusing on improving the correctness and user experience of service creation commands. Addressed a key issue by updating the default replica behavior, ensuring that when the --replicas flag is not provided, the service create command defaults to zero replicas instead of one. Enhanced input validation to enforce non-negative replica counts and refined error messages for invalid configurations, making the CLI more intuitive and reducing the risk of misconfiguration. Utilized Go to implement these changes, prioritizing code quality and alignment with user expectations over new feature development during this period.