Throw on #[Hook('foo_alter')]

These are of course implementation details, and perhaps also class misuse of terminology in Drupal-land.

But an alter isn't a hook. Alters are called differently to hooks.

I have also seen in rare cases where some hook was named with a _alter suffix, but called using the hook/invoke code path. Which would in Hux' case require you to use #[Hook] attribute. Leaving to even more #dxwtf.

Re,

[Hook] does not work as expected [Alter]

I think thats just something you get used to during learning about Hux. There is a clear delineation between hook and alter. Otherwise the design of Hux would just have one universal/multi-use Hook attribute.

I think at best for this issue, I'd consider a trigger_error or something when __constructing a #[Hook] instance, looking for str_ends_with(_alter), so at least you'd be able to patch things and deal with modules which are misbehaving w MH->invoke/alter.

Let me know your thoughts, but for now my thinking is wontfix.

Yes, i agree.