Creating playlists for courses within KAF using API

Ah, I think that link has pointed me in the right direction - the category created for the course under Blackboard_KAF>site>channels>[Blackboard Course ID] has metadata ‘channelPlaylistsIds’, whose value is the ID of the playlist. So (with the PHP client - putting out my example since I don’t find any that works with the current client):

$mdService = MetadataPlugin::get($client)->getMetadataService();

$mF = new MetadataFilter();
$mF->objectIdEqual = $cat->id;
$mF->metadataObjectTypeEqual = 2;
$md = $mdService->listAction($mF);

So it looks like, to check if a playlist is present:

foreach($md->objects as $data)
	{
	$mdSet = new \SimpleXMLElement($data->xml);
	foreach($mdSet->Detail as $mdItem)
		{
		if($mdItem->Key == 'channelPlaylistsIds')
			{
			print("Found playlists for channel: " . $mdItem->Value. "\n");
			}
		}
	}

Otherwise modify the XML by adding a Detail element with the new playlist, and calling $mdService->update on an updated Metadata object.