diff --git a/eslint.config.mjs b/eslint.config.mjs
index e453da7..5f33b10 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -56,6 +56,7 @@ export default defineConfig(
         'after',
         { overrides: { '?': 'before', ':': 'before' } },
       ],
+      'import-x/no-cycle': 'error',
       'import-x/no-duplicates': ['error', { 'prefer-inline': true }],
     },
   },
diff --git a/src/modules/investments/operation-category.ts b/src/modules/investments/operation-category.ts
new file mode 100644
index 0000000..8335697
--- /dev/null
+++ b/src/modules/investments/operation-category.ts
@@ -0,0 +1,10 @@
+export const operationCategories = [
+  'trade',
+  'income',
+  'tax',
+  'fee',
+  'transfer',
+  'other',
+] as const;
+
+export type OperationCategory = (typeof operationCategories)[number];
diff --git a/src/modules/investments/operations/infrastructure/brokerage-operation.mapper.ts b/src/modules/investments/operations/infrastructure/brokerage-operation.mapper.ts
index 5d2a752..df9cf0b 100644
--- a/src/modules/investments/operations/infrastructure/brokerage-operation.mapper.ts
+++ b/src/modules/investments/operations/infrastructure/brokerage-operation.mapper.ts
@@ -3,10 +3,8 @@ import { MILLISECONDS_PER_SECOND } from '../../../../common/time';
 import { decimal } from '../../../../integrations/tbank/decimal';
 import { TbankOperationType } from '../../../../integrations/tbank/tbank-protocol';
 import { TbankMoney, TbankOperationItem } from '../../../../integrations/tbank/tbank.api';
-import {
-  BrokerageOperationDto,
-  OperationCategory,
-} from '../presentation/brokerage-operation.dto';
+import { type OperationCategory } from '../../operation-category';
+import { BrokerageOperationDto } from '../presentation/brokerage-operation.dto';
 
 const MISSING_TIMESTAMP_COMPONENT = 0;
 
diff --git a/src/modules/investments/operations/operations.api.ts b/src/modules/investments/operations/operations.api.ts
index e197d9d..c26238c 100644
--- a/src/modules/investments/operations/operations.api.ts
+++ b/src/modules/investments/operations/operations.api.ts
@@ -5,4 +5,3 @@ export type { OperationInterval } from './domain/operations-sync-plan';
 
 // Public cross-module surface. Nest providers are exported by the matching module.
 export { BrokerageOperationDto } from './presentation/brokerage-operation.dto';
-export { operationCategories } from './presentation/brokerage-operation.dto';
diff --git a/src/modules/investments/operations/presentation/brokerage-operation.dto.ts b/src/modules/investments/operations/presentation/brokerage-operation.dto.ts
index c808477..c349c7d 100644
--- a/src/modules/investments/operations/presentation/brokerage-operation.dto.ts
+++ b/src/modules/investments/operations/presentation/brokerage-operation.dto.ts
@@ -16,6 +16,7 @@ import {
 import { MoneyDto } from '../../../../common/money.dto';
 import { AccountReferenceDto } from '../../account-reference.dto';
 import { InvestmentResourceMetaDto } from '../../investment-resource.dto';
+import { operationCategories, type OperationCategory } from '../../operation-category';
 
 const MIN_OPERATIONS_PAGE_SIZE = 1;
 
@@ -23,16 +24,6 @@ const MAX_CURSOR_LENGTH = 4096;
 const MAX_OPERATIONS_PAGE_SIZE = 1000;
 export const DEFAULT_OPERATIONS_PAGE_SIZE = 100;
 
-export const operationCategories = [
-  'trade',
-  'income',
-  'tax',
-  'fee',
-  'transfer',
-  'other',
-] as const;
-export type OperationCategory = (typeof operationCategories)[number];
-
 export class BrokerageOperationsQueryDto {
   @ApiPropertyOptional({
     format: 'uuid',
diff --git a/src/modules/investments/tbank-sync/tbank-sync.dto.ts b/src/modules/investments/tbank-sync/tbank-sync.dto.ts
index cfb5d78..d3a28f7 100644
--- a/src/modules/investments/tbank-sync/tbank-sync.dto.ts
+++ b/src/modules/investments/tbank-sync/tbank-sync.dto.ts
@@ -23,7 +23,7 @@ import {
 
 import { MAX_INSTRUMENT_QUERY_LENGTH, MIN_INSTRUMENT_QUERY_LENGTH } from '../instrument-query';
 import { InvestmentAttemptProblemDto } from '../investment-resource.dto';
-import { operationCategories } from '../operations/operations.api';
+import { operationCategories } from '../operation-category';
 
 const MIN_ACCOUNT_ID_LENGTH = 1;
 const MIN_SYNC_PAGE_SIZE = 1;