Should this also work in dev mode and/or running from live source code? Should this be using is_using_ayon_console function instead?

Might also be good in PR title and description to hint this is Windows only change.

Should this also work in dev mode and/or running from live source code? Should this be using is_using_ayon_console function instead?

The issue with that is that the function, where it is handled, is not used only for ayon launcher process.

Anyway, I get a very brief console window popping up - but it almost immediately shuts down. So it does seem to launch with a console, but whatever it executes 'finished' rapidly.

Note that "Admin > Publish Report Viewer" does NOT show a console at all... just the actions do for a very brief second.

Or is this intended to only work with command line?

Note that "Admin > Publish Report Viewer" does NOT show a console at all... just the actions do for a very brief second.

That tool is not showed in subprocess.

Anyway, I get a very brief console window popping up - but it almost immediately shuts down. So it does seem to launch with a console, but whatever it executes 'finished' rapidly.

Aaah, I didn't test it with webactions. Interesting.

EDIT:
I did test it with per-project bundles PRs where it worked, maybe it is something connected to that, changing to draft for now.