When using a folder to store multiple *.md's,
If a new file is added to the folder OR a file is deleted from the folder
Then, despite running SPMW with the --watch flag, no rebuild takes place.
I suspect you need to watch for changes in declared folders in addition to the files themselves.
My command
npx single-page-markdown-website ./kb/"*.md" --watch --open
That said, Thanks a lot for this tool. It is exactly what I wanted and is tremendously useful.