Worked on the srl-labs/containerlab repository to deliver a scalable topology templating workflow for complex network configurations. Developed a feature that enables topology template variables to be defined and merged across multiple YAML files, supporting advanced reuse and organization for multi-environment test setups. The implementation in Go leveraged configuration management and template engine skills, introducing automatic detection and loading of variables and .gotmpl files to extend template execution. Maintained backward compatibility with existing options, ensured all core package tests passed, and kept binary size impact minimal. This work simplifies template sharing and management across LABs without introducing breaking changes.