systemd system service, root-run (needs /dev/uinput access). Unit: /etc/systemd/system/ydotoold.service, ExecStart=/usr/bin/ydotoold, ExecStartPost chmods /tmp/.ydotool_socket to 666 so user rohan's scripts can talk to it without sudo. Enabled + running. Used by GNOME custom-keybinding scripts (~/.local/bin/claude-tab.sh, claude-tab-files.sh) to inject keystrokes into ghostty for the Ctrl+Shift+6/7 Claude Code launcher shortcuts (SSH to ironclad, run claude-launcher.sh / claude-launcher-yazi.sh). Compositor-independent (kernel uinput), replaced an earlier wtype-based attempt that failed on GNOME/Mutter (no zwp_virtual_keyboard_manager_v1 support).