Valentin Pinkman focused on maintaining stability in the LedgerHQ/device-sdk-ts repository by addressing issues introduced during a Next.js upgrade. He identified compatibility problems after moving to Next.js 15.1.6 and executed a rollback to version 14.2.15, restoring a reliable baseline for the project. This work involved careful dependency management and version control using YAML to ensure the stack remained stable and production-ready. Valentin validated the rollback through continuous integration and regression checks, updated release documentation, and reinforced upgrade governance. His efforts prioritized risk mitigation and operational continuity, demonstrating a methodical approach to software maintenance during a period without new feature development.