Leo Alt focused on optimizing CI resource usage in the powdr-labs/powdr repository by introducing conditional GPU job execution in GitHub Actions workflows. He implemented logic in YAML to ensure GPU-based CI jobs were skipped for draft pull requests, only triggering them when a PR was marked ready for review. This approach preserved existing CPU CI behavior while reducing unnecessary GPU compute consumption, leading to faster feedback for early-stage PRs and lower cloud costs. Leo validated the workflow changes with targeted tests and a clear test plan, demonstrating a thoughtful application of CI/CD principles and automation best practices within the project.