Instances, L0–L3 max level, measured/limit/margin/source/method, traceability chain. FAIL listed first, not under Warning. Visible skips. No pack numbers, no L3 solver.
Z/termination/levels from datasheet, stackup, fab, or cited pack only. Never invented USB ohms. No L3/OpenEMS. L0/L1 are not electrical.
Length, topology, vias, stubs, layer, grouping. Skew only vs NUMERIC mm or DESIGN LIMIT. No invented ohms/mm/ps. Not electrical. No L2/L3.
michele