All relation values now use the HFID list-of-strings format required by infrahubctl: - Cardinality one: device: ["spine1"], platform: ["arista_eos"] - Cardinality many: devices: - ["leaf1"], networks: - ["10.0.250.1/32"] - Composite HFIDs unchanged: peer_group: ["10.0.250.1", "evpn"] Files modified: 02-fabric, 03-devices, 04-interfaces, 06-vlans-vxlan, 07-bgp, 08-vrfs, 09-mlag (05-ipam already correct).