Testing

Two real clients on the same machine form an echo loop: each writes what the other wrote, forever. test_peer.py exists to avoid that. It joins the mesh and logs what it receives, but never touches its own clipboard.

python tray_client.py     # the real client
python test_peer.py       # in a second terminal

Copy something in any application and the helper should print it.

Because the helper never writes to a clipboard, it is also the quickest way to tell a discovery problem from a clipboard problem. If the helper sees the message, discovery and transport are fine and the fault is in reading or writing the clipboard on the other end.