The way that screen readers and other assistive technologies subscribe to events is defined by the platform accessibility APIs. AccessKit simply sends the right

The way that screen readers and other assistive technologies subscribe to events is defined by the platform accessibility APIs. AccessKit simply sends the right events to whatever clients are listening. Note, though, that on both Windows and macOS, AccessKit doesn't send any events until the first client makes an accessibility request. I want to provide Python bindings at some point. That would enable Kivy to implement accessibility, for example. Just haven't gotten to it yet. If anyone wants to step up and work on that, let me know.