{
  "schema": "ARC005_LAB_CASES_v1",
  "cases": [
    {
      "case_id": "baseline_reconciled",
      "billing_period": "2026-09",
      "cost_items": [
        {
          "id": "D-A",
          "kind": "DIRECT",
          "amount": 250.0,
          "target": "A"
        },
        {
          "id": "D-B",
          "kind": "DIRECT",
          "amount": 150.0,
          "target": "B"
        },
        {
          "id": "D-C",
          "kind": "DIRECT",
          "amount": 100.0,
          "target": "C"
        },
        {
          "id": "S-OBS",
          "kind": "SHARED",
          "amount": 300.0,
          "driver": "traffic",
          "quantities": {
            "A": 50,
            "B": 30,
            "C": 20
          }
        },
        {
          "id": "S-SUP",
          "kind": "SHARED",
          "amount": 180.0,
          "driver": "support_hours",
          "quantities": {
            "A": 20,
            "B": 50,
            "C": 30
          }
        }
      ],
      "policy_version": "v1",
      "approved_shared_method": "USAGE_PROPORTIONAL",
      "showback_chargeback_mode": "CHARGEBACK",
      "chargeback_authorized": true,
      "evidence_ref": "SYN-BASELINE-RECONCILED",
      "evidence_age_days": 5,
      "material_change_not_recomputed": false,
      "force_unallocated_zero": false,
      "owner_blocked": false
    },
    {
      "case_id": "missing_direct_target",
      "billing_period": "2026-09",
      "cost_items": [
        {
          "id": "D-A",
          "kind": "DIRECT",
          "amount": 250.0,
          "target": null
        },
        {
          "id": "D-B",
          "kind": "DIRECT",
          "amount": 150.0,
          "target": "B"
        },
        {
          "id": "D-C",
          "kind": "DIRECT",
          "amount": 100.0,
          "target": "C"
        },
        {
          "id": "S-OBS",
          "kind": "SHARED",
          "amount": 300.0,
          "driver": "traffic",
          "quantities": {
            "A": 50,
            "B": 30,
            "C": 20
          }
        },
        {
          "id": "S-SUP",
          "kind": "SHARED",
          "amount": 180.0,
          "driver": "support_hours",
          "quantities": {
            "A": 20,
            "B": 50,
            "C": 30
          }
        }
      ],
      "policy_version": "v1",
      "approved_shared_method": "USAGE_PROPORTIONAL",
      "showback_chargeback_mode": "CHARGEBACK",
      "chargeback_authorized": true,
      "evidence_ref": "SYN-MISSING-DIRECT-TARGET",
      "evidence_age_days": 5,
      "material_change_not_recomputed": false,
      "force_unallocated_zero": false,
      "owner_blocked": false
    },
    {
      "case_id": "unapproved_equal_split",
      "billing_period": "2026-09",
      "cost_items": [
        {
          "id": "D-A",
          "kind": "DIRECT",
          "amount": 250.0,
          "target": "A"
        },
        {
          "id": "D-B",
          "kind": "DIRECT",
          "amount": 150.0,
          "target": "B"
        },
        {
          "id": "D-C",
          "kind": "DIRECT",
          "amount": 100.0,
          "target": "C"
        },
        {
          "id": "S-OBS",
          "kind": "SHARED",
          "amount": 300.0,
          "driver": "traffic",
          "quantities": {
            "A": 50,
            "B": 30,
            "C": 20
          }
        },
        {
          "id": "S-SUP",
          "kind": "SHARED",
          "amount": 180.0,
          "driver": "support_hours",
          "quantities": {
            "A": 20,
            "B": 50,
            "C": 30
          }
        }
      ],
      "policy_version": "v1",
      "approved_shared_method": "USAGE_PROPORTIONAL",
      "showback_chargeback_mode": "CHARGEBACK",
      "chargeback_authorized": true,
      "evidence_ref": "SYN-UNAPPROVED-EQUAL-SPLIT",
      "evidence_age_days": 5,
      "material_change_not_recomputed": false,
      "force_unallocated_zero": false,
      "owner_blocked": false,
      "shared_method_override": "EQUAL_SPLIT"
    },
    {
      "case_id": "force_unallocated_zero",
      "billing_period": "2026-09",
      "cost_items": [
        {
          "id": "D-A",
          "kind": "DIRECT",
          "amount": 250.0,
          "target": null
        },
        {
          "id": "D-B",
          "kind": "DIRECT",
          "amount": 150.0,
          "target": "B"
        },
        {
          "id": "D-C",
          "kind": "DIRECT",
          "amount": 100.0,
          "target": "C"
        },
        {
          "id": "S-OBS",
          "kind": "SHARED",
          "amount": 300.0,
          "driver": "traffic",
          "quantities": {
            "A": 50,
            "B": 30,
            "C": 20
          }
        },
        {
          "id": "S-SUP",
          "kind": "SHARED",
          "amount": 180.0,
          "driver": "support_hours",
          "quantities": {
            "A": 20,
            "B": 50,
            "C": 30
          }
        }
      ],
      "policy_version": "v1",
      "approved_shared_method": "USAGE_PROPORTIONAL",
      "showback_chargeback_mode": "CHARGEBACK",
      "chargeback_authorized": true,
      "evidence_ref": "SYN-FORCE-UNALLOCATED-ZERO",
      "evidence_age_days": 5,
      "material_change_not_recomputed": false,
      "force_unallocated_zero": true,
      "owner_blocked": false,
      "forced_target": "A"
    },
    {
      "case_id": "policy_changed_not_recomputed",
      "billing_period": "2026-09",
      "cost_items": [
        {
          "id": "D-A",
          "kind": "DIRECT",
          "amount": 250.0,
          "target": "A"
        },
        {
          "id": "D-B",
          "kind": "DIRECT",
          "amount": 150.0,
          "target": "B"
        },
        {
          "id": "D-C",
          "kind": "DIRECT",
          "amount": 100.0,
          "target": "C"
        },
        {
          "id": "S-OBS",
          "kind": "SHARED",
          "amount": 300.0,
          "driver": "traffic",
          "quantities": {
            "A": 50,
            "B": 30,
            "C": 20
          }
        },
        {
          "id": "S-SUP",
          "kind": "SHARED",
          "amount": 180.0,
          "driver": "support_hours",
          "quantities": {
            "A": 20,
            "B": 50,
            "C": 30
          }
        }
      ],
      "policy_version": "v2",
      "approved_shared_method": "USAGE_PROPORTIONAL",
      "showback_chargeback_mode": "CHARGEBACK",
      "chargeback_authorized": true,
      "evidence_ref": "SYN-POLICY-CHANGED-NOT-RECOMPUTED",
      "evidence_age_days": 5,
      "material_change_not_recomputed": true,
      "force_unallocated_zero": false,
      "owner_blocked": false
    },
    {
      "case_id": "stale_driver_evidence",
      "billing_period": "2026-09",
      "cost_items": [
        {
          "id": "D-A",
          "kind": "DIRECT",
          "amount": 250.0,
          "target": "A"
        },
        {
          "id": "D-B",
          "kind": "DIRECT",
          "amount": 150.0,
          "target": "B"
        },
        {
          "id": "D-C",
          "kind": "DIRECT",
          "amount": 100.0,
          "target": "C"
        },
        {
          "id": "S-OBS",
          "kind": "SHARED",
          "amount": 300.0,
          "driver": "traffic",
          "quantities": {
            "A": 50,
            "B": 30,
            "C": 20
          }
        },
        {
          "id": "S-SUP",
          "kind": "SHARED",
          "amount": 180.0,
          "driver": "support_hours",
          "quantities": {
            "A": 20,
            "B": 50,
            "C": 30
          }
        }
      ],
      "policy_version": "v1",
      "approved_shared_method": "USAGE_PROPORTIONAL",
      "showback_chargeback_mode": "CHARGEBACK",
      "chargeback_authorized": true,
      "evidence_ref": "SYN-STALE-DRIVER-EVIDENCE",
      "evidence_age_days": 45,
      "material_change_not_recomputed": false,
      "force_unallocated_zero": false,
      "owner_blocked": false
    },
    {
      "case_id": "owner_blocks_chargeback",
      "billing_period": "2026-09",
      "cost_items": [
        {
          "id": "D-A",
          "kind": "DIRECT",
          "amount": 250.0,
          "target": "A"
        },
        {
          "id": "D-B",
          "kind": "DIRECT",
          "amount": 150.0,
          "target": "B"
        },
        {
          "id": "D-C",
          "kind": "DIRECT",
          "amount": 100.0,
          "target": "C"
        },
        {
          "id": "S-OBS",
          "kind": "SHARED",
          "amount": 300.0,
          "driver": "traffic",
          "quantities": {
            "A": 50,
            "B": 30,
            "C": 20
          }
        },
        {
          "id": "S-SUP",
          "kind": "SHARED",
          "amount": 180.0,
          "driver": "support_hours",
          "quantities": {
            "A": 20,
            "B": 50,
            "C": 30
          }
        }
      ],
      "policy_version": "v1",
      "approved_shared_method": "USAGE_PROPORTIONAL",
      "showback_chargeback_mode": "CHARGEBACK",
      "chargeback_authorized": true,
      "evidence_ref": "SYN-OWNER-BLOCKS-CHARGEBACK",
      "evidence_age_days": 5,
      "material_change_not_recomputed": false,
      "force_unallocated_zero": false,
      "owner_blocked": true
    },
    {
      "case_id": "transfer_new_venture",
      "billing_period": "2026-09",
      "cost_items": [
        {
          "id": "D-A",
          "kind": "DIRECT",
          "amount": 250.0,
          "target": "A"
        },
        {
          "id": "D-B",
          "kind": "DIRECT",
          "amount": 150.0,
          "target": "B"
        },
        {
          "id": "D-C",
          "kind": "DIRECT",
          "amount": 100.0,
          "target": "C"
        },
        {
          "id": "D-D",
          "kind": "DIRECT",
          "amount": 40.0,
          "target": "D"
        },
        {
          "id": "S-PLATFORM",
          "kind": "SHARED",
          "amount": 200.0,
          "driver": "traffic",
          "quantities": {
            "A": 50,
            "B": 30,
            "C": 15,
            "D": 5
          }
        },
        {
          "id": "S-ONBOARD",
          "kind": "SHARED",
          "amount": 400.0,
          "driver": "support_hours",
          "quantities": {
            "A": 15,
            "B": 20,
            "C": 25,
            "D": 40
          }
        }
      ],
      "policy_version": "v2",
      "approved_shared_method": "USAGE_PROPORTIONAL",
      "showback_chargeback_mode": "CHARGEBACK",
      "chargeback_authorized": true,
      "evidence_ref": "SYN-TRANSFER",
      "evidence_age_days": 5,
      "material_change_not_recomputed": false,
      "force_unallocated_zero": false,
      "owner_blocked": false
    }
  ]
}