Worked on stabilizing network federation in the hashicorp/consul repository by addressing a critical bug affecting WAN IPv6 address bracketing. Focused on improving cross-site connectivity, the developer identified and resolved an issue where IPv6 addresses were not properly enclosed in brackets when advertised to the WAN, which previously caused federation failures. The solution involved targeted changes to the join flooder logic, ensuring correct IPv6 handling between LAN and WAN environments. Using Go and leveraging expertise in networking and Consul internals, the developer also documented the fix in the changelog, enhancing visibility and auditability for future maintenance and operational reliability.