There's a known issue with Brackets that keeps multiple code hinters from being run at the same time. Therefore, for this extension to work, make sure you have no other code hinters installed.
- Install Brackets 1.0 or later.
- In Brackets, click the menu item File > Extension Manager...
- Go to the "Available" tab of the dialog that appears.
- Type "jquery mobile code hinter" in the search box.
- Click the "Install" button in the search result for jQuery Mobile Code Hinter.