(version 1)

# KiCad 8 Custom Design Rules for 6U Tri-Mode Storage Baseboard
# Enforces PCIe 85-Ohm and SAS 100-Ohm SI rules, skew tolerances, and via stitching

(rule "PCIe 85 Ohm Differential Clearance"
   (constraint clearance (min 0.15mm))
   (condition "A.NetClass == 'PCIe_85Ohm' && B.NetClass == 'PCIe_85Ohm'"))

(rule "PCIe Inter-Pair 5W Isolation"
   (constraint clearance (min 1.15mm))
   (condition "A.NetClass == 'PCIe_85Ohm' && B.NetClass != 'PCIe_85Ohm' && !B.isGroundPlane()"))

(rule "SAS 100 Ohm Differential Clearance"
   (constraint clearance (min 0.20mm))
   (condition "A.NetClass == 'SAS_100Ohm' && B.NetClass == 'SAS_100Ohm'"))

(rule "SAS Inter-Pair 5W Isolation"
   (constraint clearance (min 1.00mm))
   (condition "A.NetClass == 'SAS_100Ohm' && B.NetClass != 'SAS_100Ohm' && !B.isGroundPlane()"))

(rule "High-Current 12V Power Trace Width"
   (constraint track_width (min 1.50mm))
   (condition "A.NetClass == 'Power_12V'"))

(rule "High-Speed Microstrip Layer Restriction"
   (constraint layer_restriction (only "F.Cu"))
   (condition "A.NetClass == 'PCIe_85Ohm' || A.NetClass == 'SAS_100Ohm'"))