In my multiplatform SwiftUI document app, where should I implement undo? In the Views with Forms and Lists, Bindings, data classes or somewhere else? I am now implementing undo in Bindings and Lists, but I'm wondering if that's the right way to do it.

The sysEx struct in the MIDIUniversalMessage struct has a channel member but the System Exclusive (7-Bit) Message doesn't have a channel field. The System Exclusive (7-Bit) Message has a # of bytes field but the sysEx struct doesn't have a nrOfBytes, byteCount or bytesUsed member. It looks like the channel member of the sysEx struct contains the number of used bytes. Is this a mistake in the header or did I misunderstand something?

How to report a bug says "With Feedback Assistant available on iPhone, iPad, Mac, and the web, it’s easy to report issues you encounter". The Feedback Assistant User Guide says "Tell Apple about your experience with beta or seed releases". Is Feedback Assistant only intended for reporting bugs in beta software? A year ago I reported a bug in Xcode 14 and now I'm being asked to verify this issue with Xcode 16 Beta 3. I'm not a beta tester and I don't want to install beta software. How should I proceed?