Unlike almost every other module in the API, ApiWatch emits only title without the traditional ns that usually accompanies it.
This seems like a tractable issue, without compatibility problems. My guess is that it would be an easy one for new developers to work on, and should fit pretty easily into the Clinic Duty timeframe.
Good start, but there's a standard function to add title and namespace (the main concern being that 'ns' is the standard key for namespace). I'm not really a PHP programmer, but I believe the first couple of lines should look like this:
$res = ; ApiQueryBase::addTitleInfo( $res, $title );