Developed a configurable template instantiation feature for the coreeng/corectl repository, introducing a new --config command line option that allows users to pass JSON configuration files for dynamic overrides and deep merging with existing template settings. This enhancement improved deployment reproducibility and minimized manual configuration drift across environments, supporting more scalable and maintainable templated deployments. The work involved Go programming, command line interface development, and advanced template rendering techniques, with a focus on robust JSON configuration handling and deep merge logic. Collaboration was demonstrated through co-authored commits, ensuring code quality and traceability while addressing real-world deployment challenges in infrastructure automation.