During May 2025, Chris Liu expanded the payments data model in the getlago/lago-go-client repository, focusing on backend development using Go. He introduced support for external customer IDs, NextAction redirects, and metadata within PaymentResult structures, enabling richer data payloads and facilitating smoother integration with external payment providers. His work included targeted fixes to ensure missing payment parameters and metadata were correctly handled, improving the reliability and correctness of payment flows. Chris demonstrated careful API and data model design, emphasizing maintainability and readiness for future integrations. The depth of his contributions positioned the codebase for enhanced analytics and reconciliation capabilities.