$ npm install jadewatch -g

$ cd folder/with/jade/files
$ jadewatch
watching 1 jade files for changes. 

$ jadewatch --help

Output filename extension. Defaults is html.

$ jadewatch -e xsl
watching 1 jade files for changes. 
file.jade > file.xsl 13:00:08 GMT+0100 (BST)

Output beatified html. Use this options to have human readable html.

$ jadewatch -b