Development record

npm's value-taking config flags and global options are not in the runner value-flag lists, so their value is read as the program: npm exec --registry <url> kill-port 3000, --cache <dir>, --userconfig <file>, and a global option before the subcommand (npm --prefix . exec kill-port 3000) read the value or the option as the program and only warn as an unrecognised launcher where npm exec kill-port 3000 blocks.