@jwz I haven't done much X programming since you and I last met at the Raleigh Linux Expo, so I don't really understand the question or answer, but Clade did some deep research and came up with:

To find the wl_surface backing an Xwayland X11 Window, you need to:

1. Legacy method: Listen for WL_SURFACE_ID ClientMessage on X11 windows (requires SubstructureRedirect on root
window), extract the surface ID from data.l[0], but beware of race conditions.

...

@jwz ...

2. Modern method: Use the xwayland-shell-v1 Wayland protocol with WL_SURFACE_SERIAL ClientMessage to establish a
robust, race-free association.

For xscreensaver, this requires becoming a hybrid X11/Wayland compositor to properly map screensaver windows, which
is a significant architectural change.

@jafo You just pasted un-tested and un-verified AI slop at me?

Are you fucking *kidding* me??

@jafo Not only was it unhelpful, it was the diametric opposite of helpful. You used the rainforest-incinerating autocomplete plausible-lie-generator to not only not answer my question, but also remind me that I share a planet with people who don't understand why this is not a good idea.

"Everyone in this room is now dumber for having listened to it. I award you no points, and may God have mercy on your soul."