Nobody draws the roads — Nothing in the cage is hand-placed. The map derives from the furniture, the roads from prices. The first pricing failed identically for opposite birds, because a toll on climbing telescopes to the same net rise; character came from taxing the journey, not the destination.
One symptom, four bugs — Birds couldn't get through the swing. The report came back four times, each from a different bug. What each verifying probe was blind to, and the four readings the one-way seat takes: side, motion, history, intent.