HomePod's Siri will have access to messaging, memo, and list apps—nothing else. If you disagree, feel free to cite the developer documentation that states otherwise, with or without your usual ad hominem embellishments.
I disagree. Again, you really don't understand what you're saying.
But I won't cite developer documentation. I'll actually feel free to cite whatever I want, lol.
http://homepodinfo.com/apple-homepod-siri-commands
The truth is Siri on Homepod has access to significantly more. It's developers which only have access to HomePod's Siri on the things you listed, but you didn't actually say that. I understood what you meant though, I'm just reflecting the reality that you have no true understanding of what you're actually saying. You use words you don't really understand, and say things you don't really mean. While thinking that you comprehend clearly. That's funny; possible, but improbable.
True, but that doesn't materially affect HomePod's lack of API endpoints to non-Apple music services.
You're trying to steer things in the way you want them to be, to fit your delusion. It is a fact, that you claimed that the absence of "streaming control" was relevant in SiriKit. It is not. You then tried to switch it up and say it was "endpoints for track controls" is what SiriKit needs. It is not. Now you're trying to say it needs "API endpoints to non-Apple music services."
It does not.
No matter how you phrase it, it's not going to be any more true. It's your logic in the situation that is fundamentally incorrect. What you're proposing is actually a programmatic fallacy, and is not how AI development is approached. You believe developers need actionable access to Siri, but that's actually an inaccurate order. The app isn't supposed to trigger Siri, so Developers don't need actionable access to it (but they could be given actionable access, like say clicking on the mic button within an app would trigger Siri, such functionality could be given, but is not necessary because of the order of processes). It's Voice that triggers Siri, and then Siri triggers the app. In the correct order of process, there is nothing that Developers need actionable access to.
Instead, it's Siri which needs access to the developer apps, and it's the developers that must define their data in a way that Apple describes, so that Siri understands. Those aren't programmatic endpoints necessarily. It can be, depending on how it's implemented. But it could just as easily be defined in a text file that Siri simply parses. But you previously did not even understand the difference in nuance of developers accessing Siri, versus Siri accessing the Developer's apps.
Perhaps to you they are the same, and you're just trying to convey an idea without truly understanding it.
So I understand that your point in some roundabout way is: "even if people complained to Developers there are just some things they can't do, which although I honestly don't understand why they can't do it, it doesn't change the reality that they can't do it. So those developers weren't given the necessary tools." Which would be true, but it's biased. Because it's addressing them not being given the tools to what you want them to do, and yes for everyone like you complaining to Developers would have no fruitful results. But there are many others that complaining to developers might have fruitful results because they were given the tools.
At the end of the day, yes some developers do not have access to do what you want them to do. But I was conveying that developers have access and were given tools to access HomePod, so HomePod is not truly a closed-system (it's just closed in a way that you wish it was open). What you desire and its absence stands, but it in no way diminishes what my premise actually was. You just arrogantly deluded I had not read what I referenced, and that you understood the situation better. When in truth, I actually understand the situation intimately, and of course I truly read it. I've been a developer for 30 years, lol. -- But you were too blind by your own ego to see, that I actually referenced more knowledge than what you read. While you continued to delude that you understood.
For example, "UX kluge"
Before that hack was even mentioned in that thread, people were listing Siri keywords that work with Spotify out of the box. You keep thinking that you need a hack to get Siri to work with Spotify, you're obviously not really understanding the situation. You "think" it's understanding the situation, but it's not. Siri by default has playback keywords that work with Spotify, so therefore Siri is already able to control playback via apps. People covered that in that forum thread. And as I keep telling you, it's not as you think, and you don't really understand.
I really hope that Siri control of AirPlay streams are enabled from the door on HomePod as they already exist on iOS. So you can take a slice of humble pie.