Worked on the xtyxtyx/go-git repository to enhance URL configuration management by introducing multi-key support for the InsteadOf directive. Refactored the Go codebase to represent InsteadOf mappings as lists, updating validation, marshaling, unmarshaling, and matching logic to accommodate multiple substitution keys. This change enabled more flexible and complex remote URL rewriting workflows, reducing the need for manual configuration edits. The update included migration guidance and documentation to minimize disruption for downstream users. Focused on code quality and future extensibility, the work leveraged Go programming skills and configuration management expertise to deliver a breaking but valuable feature enhancement.