Peter Santesson worked on stabilizing package management for Ubuntu deployments in the SUNET/puppet-sunet repository by addressing a bug in the Grafana repository manifest. He identified and corrected a typo in the conditional logic that detects Ubuntu distributions, ensuring that package installations proceed correctly and reducing the risk of misconfiguration. Using his expertise in Puppet and configuration management, Peter delivered a focused, well-documented fix that reconciled manifest logic with actual system behavior. The change improved deployment reliability and code traceability, demonstrating careful attention to detail and a methodical approach to infrastructure automation using Puppet as the primary language and tool.