Excel CLI discovery

The plugin does not place excelcli on PATH. Its launcher runs npx -y @sbroenne/excelcli@latest; do not assume a standalone executable is installed or restore the retired GitHub-release downloader.

For the plugin-bundled copy of this skill, ..\..\bin\start-cli.ps1 relative to the directory containing this SKILL.md locates the plugin launcher. Replace <plugin-root> below with that plugin's actual installed directory:

& "<plugin-root>\bin\start-cli.ps1" --help
& "<plugin-root>\bin\start-cli.ps1" session --help

Use the same full launcher path for subsequent commands, especially quoted JSON arguments in Windows PowerShell. Discover exact command names, flags, defaults, and save/close behavior through native --help; do not invent syntax.