Different result via npm script and npx

wtf.md

If I use the following npm script:

"scripts": {
  "lint:markdown": "markdownlint app/**/*.md",
},

and run npm run lint:markdown, the glob only finds 5 files.

However, if I run the same command via npx, e.g. npx markdownlint app/**/*.md, glob correctly finds 287 files.

I’ve added logging to the executable in node_modules/bin/markdownlint, and both commands display this logging, to the same executable is being run. WTF?