Show HN: Git-knife – edit commit messages, authors, and dates like a spreadsheet

Git-knife is a new desktop GUI tool that allows users to edit git commit metadata—including messages, author names/emails, and both author and committer dates—directly in a spreadsheet-like interface. Unlike existing git GUIs that treat commit dates as immutable or CLI tools that lack user-friendly interfaces, git-knife fills the gap by providing a clean visual editor for bulk metadata changes with regex find-and-replace support, automatic backups, and safety warnings for pushed history. The tool is currently in MVP status and safely rewrites commits using git's native CLI without modifying file contents.