xlsx-pro
This skill generates and edits Excel files with formulas and can optionally recalculate them via LibreOffice headless. It executes local commands (runs `soffice`, compiles a shim with `gcc`) and writes LibreOffice macro files to `~/.config/libreoffice/4/user/basic/Standard` and `~/Library/Application Support/LibreOffice/4/user/basic/Standard`, setting `LD_PRELOAD` and `SAL_USE_VCLPLUGIN`.