April 2026 monthly summary for macvim-dev/macvim and vim/vim focused on tar extraction reliability and modern compression format support. Key features delivered include targeted fixes to tar extraction command generation for lz4 in the macvim Tar Plugin, and zstd handling plus dotted-path extraction improvements in vim's tar.vim. Major bugs fixed encompass: (1) correct extraction commands for lz4-compressed tar archives (.tlz4 and .tar.lz4) with proper spacing and flag handling; (2) proper separation of the --zstd flag from other arguments in tar invocations; (3) preservation of rightmost dots in paths to avoid stripping extensions. Expanded test coverage validates zstd support and dotted-path scenarios. Overall impact: increased reliability and performance of archive operations, reduced user friction when working with modern compression formats, and smoother CI/test validation. Technologies/skills demonstrated include tar CLI flag management and command construction, Vimscript/C patching, test framework enhancements, and cross-repo collaboration (acknowledged in commits).