Jeroen Deinum developed a git tag-based versioning workflow for unpublished packages in the release-plz/release-plz repository, focusing on improving internal release processes. He introduced a git_only configuration option that derives package versions directly from git tags, reducing dependency on the cargo registry and enhancing version accuracy for packages not published to crates.io. Using Rust and Git, Jeroen implemented validation logic to prevent conflicting settings between git_only and publish options, minimizing the risk of misconfiguration. This work streamlined internal release cycles by making version detection more reliable and predictable, demonstrating a thoughtful approach to version control and workflow automation.