Phase A: stub, return-split, and BOM termination on buses present on the
graph; DDR/CPU/FPGA class certifiers only when that device exists. Skip
without evidence. Via, pad, track, and zone stay distinct. Not DRC or FEM.
USB-C/RJ45/PoE/DDR3 are the method, not a catalog. No connector means
no finding. Bare RJ45 is Ethernet only; PoE needs PoE evidence. HubAudio
has USB-C and PoE MagJack, not DDR. Skip-I unchanged.
Dedicated deterministic engines certify class and connection integrity
(CC1/CC2, Rd 5.1 kΩ, VBUS/GND, SuperSpeed if USB3; 10/100 vs GbE
magnetics; PoE only with evidence). Missing evidence is INSUFFICIENT
or N/A, never invented PoE, SuperSpeed, Z, or I. No FEM, no via IPC.
michele