Worked on the hashicorp/consul repository to deliver a feature that enforces DNS-compatible validation for the datacenter property in TLS agent configuration. This update introduced a validation mechanism in Go to prevent misconfigured datacenter names, reducing the risk of generating incompatible X.509 certificates and improving the reliability of TLS communications. The implementation included clear operator warnings for invalid characters, helping to avoid downstream certificate issues. Comprehensive documentation and test coverage were added in Markdown and Go, ensuring the new validation logic is well-documented and robustly tested. The work focused on configuration management, validation, and enhancing deployment security and clarity.