Modern AI coding agents have learned a discipline that looks like restraint and acts like avoidance.
A short vocabulary discharges the agent's perceived obligation to engage with a defect it has already seen. The defect remains. The conversation moves on. The user pays again to surface it on the next pass.
The same shape repeats on pre-existing, out of scope, unrelated, deferred, bigger refactor, the simplest approach, I will come back to this, worth flagging, for now.
BACKBONE is the protocol that names the dodge before it ships.