diff --git a/api-v3/test/unit/f6-1-operational-context-consistency.test.ts b/api-v3/test/unit/f6-1-operational-context-consistency.test.ts
new file mode 100644
index 0000000..50eb34d
--- /dev/null
+++ b/api-v3/test/unit/f6-1-operational-context-consistency.test.ts
@@ -0,0 +1,48 @@
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+import test from 'node:test';
+
+function source(path: string): string {
+  return readFileSync(resolve(process.cwd(), path), 'utf8');
+}
+
+test('F6.1 preserves Inventory operator snapshots and changes operator only through Area relations', () => {
+  const relations = source('src/asset-master/asset-operational-relations.service.ts');
+  const migration = source('src/database/migrations/1790087250000-f5-operational-context-compatibility.ts');
+
+  assert.match(migration, /Runtime ownership and search MUST NOT depend on it/);
+  assert.match(migration, /La Empresa se cambia en la relación temporal del Área, no en el Inventario/);
+  assert.match(relations, /operatorSnapshotPreserved:true/);
+  assert.doesNotMatch(relations, /UPDATE assets asset[\s\S]*SET operator_company_id=/);
+});
+
+test('F6.1 blocks operator mutation through generic Inventory edit DTOs', () => {
+  const updateDto = source('src/asset-master/dto/update-asset.dto.ts');
+  const contextDto = source('src/asset-master/dto/change-asset-context.dto.ts');
+
+  for (const dto of [updateDto, contextDto]) {
+    assert.match(dto, /@IsEmpty/);
+    assert.match(dto, /La Operadora se administra en la relación temporal del Área, no en el Inventario/);
+  }
+});
+
+test('F6.1 resolves temporal Inventory operator from Area relation history', () => {
+  const temporal = source('src/asset-master/asset-temporal.service.ts');
+
+  assert.match(temporal, /FROM area_company_relations relation/);
+  assert.match(temporal, /relation\.valid_from <= \$2/);
+  assert.match(temporal, /relation\.valid_until IS NULL OR relation\.valid_until > \$2/);
+  assert.match(temporal, /operator_company\.id=operator_relation\.company_id/);
+  assert.doesNotMatch(temporal, /operator_company\.id=history\.operator_company_id/);
+});
+
+test('F6.1 verification planning uses Area relation truth instead of Inventory operator snapshot', () => {
+  const verification = source('src/inspection-verifications/inspection-verifications.service.ts');
+
+  assert.match(verification, /FROM area_company_relations relation/);
+  assert.match(verification, /relation\.valid_from <= \$2::timestamptz/);
+  assert.match(verification, /VERIFICATION_OPERATOR_NOT_ACTIVE/);
+  assert.match(verification, /operatorSource: 'area_company_relations'/);
+  assert.doesNotMatch(verification, /company\.id = asset\.operator_company_id/);
+});