Record ownership ledger and completed CommerceCanon rename

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a070b5-4994-7271-bd8b-7c3dbcedec4b

tools/test_validate_ownership.py

@@ -0,0 +1,54 @@
+"""Exercise migration-loss and ownership-conflict failure modes."""
+
+import copy
+import json
+from pathlib import Path
+import unittest
+
+from validate_ownership import validate
+
+
+class OwnershipValidationTests(unittest.TestCase):
+    def setUp(self):
+        root = Path(__file__).resolve().parents[1] / 'ledger'
+        self.ledger = json.loads((root / 'concept-ownership.json').read_text())
+        self.inventory = json.loads((root / 'source-inventory.json').read_text())
+
+    def errors(self):
+        return validate(self.ledger, self.inventory)['errors']
+
+    def test_complete_inventory(self):
+        self.assertEqual(self.errors(), [])
+
+    def test_lost_source_entry(self):
+        self.ledger['entries'].pop()
+        self.assertTrue(self.errors())
+
+    def test_duplicate_mapping(self):
+        self.ledger['entries'].append(copy.deepcopy(self.ledger['entries'][0]))
+        self.assertTrue(self.errors())
+
+    def test_conflicting_owner_across_entries(self):
+        target = self.ledger['entries'][1]['targets'][0]
+        target['concept'] = 'Actor'
+        target['owner']['model'] = 'itc-ident'
+        result = validate(self.ledger, self.inventory)
+        self.assertEqual(result['multiply_owned_concepts'], 1)
+        self.assertTrue(result['errors'])
+
+    def test_missing_owner(self):
+        self.ledger['entries'][0]['targets'][0].pop('owner')
+        self.assertTrue(self.errors())
+
+    def test_lost_half_of_split(self):
+        entry = next(e for e in self.ledger['entries'] if e['disposition'] == 'split')
+        entry['targets'].pop()
+        self.assertTrue(self.errors())
+
+    def test_convenience_term_promotion(self):
+        self.ledger['entries'][-1]['targets'][0]['kind'] = 'concept'
+        self.assertTrue(self.errors())
+
+
+if __name__ == '__main__':
+    unittest.main()