Published specialized Nano D UART connector: UID 282faa1f-da4d-48db-a285-ff2976f4e61a, version 23a2abbb-61d5-479b-9968-2c191fd96cfd.
Verified pin 1 Input, pin 2 Output, pins 3–4 Passive; original pin names, numbers, geometry, assets, and pad mappings preserved. Generic library unchanged; no fake connections added, and power remains separate via J_PWR.