What the rules had to survive here: a fallback chain is naturally a flowchart — decision diamond, two branches, four arrows. Redrawn, the sequence is the reading order and the registry itself is drawn: one square per entry it could return. The gap in the third row is the shortfall, at its real size.

Where status colour replaces the accent. This drawing is about a degraded answer, so the gap carries --status-warn and orange stays out of the chart entirely. A diagram gets one emphasis, never two.