During November 2025, Michael Ristau focused on security hardening for the onyx-dot-app/onyx repository by upgrading Nginx from version 1.23.4 to 1.25.5 across all deployment configurations. He addressed critical vulnerabilities identified in CVE-2023-38545 and CVE-2023-38546, consolidating the patch into a single commit for maintainability. Using Python and YAML, Michael validated the upgrade in staging before deploying to production, ensuring minimal disruption. His work demonstrated strong DevOps practices, robust configuration management, and attention to security compliance. Although the period involved no new features, the depth of the security fix improved the project’s overall compliance and operational resilience.