Worked on the denoland/typescript-go repository to enhance the robustness of JSON handling within the DocumentIdentifier component. Addressed a critical issue where improper JSON unmarshaling could cause runtime panics by introducing validation for the 'uri' key and handling missing or invalid fields gracefully. Leveraged Go for backend development, focusing on API stability and maintainability. Developed comprehensive unit tests to cover a wide range of edge cases, ensuring the parsing layer remains stable for downstream consumers. This work improved the reliability of JSON processing and demonstrated a methodical, test-driven approach to bug fixing and codebase maintenance within a Go-based environment.