Add AMAZON.GetDetailIntent to Audio Player Interface
Currently, one has to create a custom intent and execute it by using the invocation phrase with the intent. Example:
"Alexa, open My Podcast Player and get the current song"
Or, with this feature request:
"Alexa, what's playing?"
The documentation makes note that this is currently not available: https://developer.amazon.com/docs/custom-skills/audioplayer-interface-reference.html#intents
"This only applies to the built-in intents. The intents you define (such as the example PlayLatestEpisode intent) must be invoked using a normal invocation phrase."

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Mohamed Sayed commented
This is very critical requirement for my skill
as my skill streams an audio which could last for more than 30 min, and in the middle user would like to know what is currently playing. -
Anonymous commented
Audio Player Interface - New Default Intent Suggestion:
AMAZON.GetDetailsIntent
This would be handy for intents such as "Alexa, what's playing?" Currently, you have to create a custom intent and use the invocation phrase of the skill in order to access it, which feels bulky.