What you are asking already exist, it’s the Blue-Purple line feature :
Blue-Purple gradient line โ unidirectional connection. Miqobot will move only from blue to purple.
You can think of them as arrows pointing in the purple end.
Tip: This is useful for creating shortcuts from high cliffs or walls. Miqobot will jump down, but she wonโt try to climb back up. Make sure you also set up an alternative way back (in case you need it).
When you’re in the Editor, just press CTRL to toggle between Green and Red mode, once in Red mode, right click on a line to cycle through the colour mode, and pick the Blue-purple one you need.
Remember, Miqobot will move only from blue to purple, so pick the right one.