refactor(core): Move the response errors into @n8n/backend-services (no-changelog)

Move the generic ResponseError classes from cli into the shared package.
Feature-specific errors stay in cli. cli now depends on the package.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

packages/@n8n/backend-services/README.md

@@ -27,9 +27,13 @@ and infrastructure services that need the persistence layer or that only
 
 ## What lives here
 
-Nothing yet. The next PRs move the response errors, `UrlService`, `CacheService`,
-`RedisClientService`, `ProtectedResourceRegistry`, `EventService`, `RoleService`,
-the finder services and the scope checks here, one area at a time.
+| Export | Purpose |
+| --- | --- |
+| `ResponseError` and its subclasses (`BadRequestError`, `NotFoundError`, `ForbiddenError`, ...) | Errors that map to an HTTP status code in a REST response |
+
+The next PRs move `UrlService`, `CacheService`, `RedisClientService`,
+`ProtectedResourceRegistry`, `EventService`, `RoleService`, the finder services
+and the scope checks here, one area at a time.
 
 ## Compatibility with cli
 

packages/@n8n/backend-services/package.json

@@ -22,6 +22,10 @@
   "files": [
     "dist/**/*"
   ],
+  "dependencies": {
+    "@n8n/api-types": "workspace:*",
+    "n8n-workflow": "workspace:*"
+  },
   "devDependencies": {
     "@n8n/eslint-config": "workspace:*",
     "@n8n/oxlint-config": "workspace:*",

packages/@n8n/backend-services/src/errors/response-errors/__tests__/response.error.test.ts

@@ -0,0 +1,30 @@
+import { BadRequestError } from '../bad-request.error';
+import { InternalServerError } from '../internal-server.error';
+import { NotFoundError } from '../not-found.error';
+import { ServiceUnavailableError } from '../service-unavailable.error';
+
+describe('ResponseError', () => {
+	it('should set the error level from the HTTP status code', () => {
+		expect(new BadRequestError('bad').level).toBe('warning');
+		expect(new ServiceUnavailableError('down').level).toBe('info');
+		expect(new InternalServerError('boom').level).toBe('error');
+	});
+
+	it('should default the error code to the HTTP status code', () => {
+		const error = new BadRequestError('bad');
+
+		expect(error.httpStatusCode).toBe(400);
+		expect(error.errorCode).toBe(400);
+	});
+
+	it('should keep the cause', () => {
+		const cause = new Error('root');
+
+		expect(BadRequestError.wrap('bad', cause).cause).toBe(cause);
+	});
+
+	it('should assert a defined value', () => {
+		expect(() => NotFoundError.isDefinedAndNotNull(null, 'missing')).toThrow(NotFoundError);
+		expect(() => NotFoundError.isDefinedAndNotNull('x', 'missing')).not.toThrow();
+	});
+});

packages/@n8n/backend-services/src/index.ts

@@ -1 +1,18 @@
-export {};
+export { ResponseError } from './errors/response-errors/abstract/response.error';
+export { AuthError } from './errors/response-errors/auth.error';
+export { BadRequestError } from './errors/response-errors/bad-request.error';
+export { ConflictError } from './errors/response-errors/conflict.error';
+export { ContentTooLargeError } from './errors/response-errors/content-too-large.error';
+export { ForbiddenError } from './errors/response-errors/forbidden.error';
+export { InternalServerError } from './errors/response-errors/internal-server.error';
+export { LockedError } from './errors/response-errors/locked.error';
+export { NotFoundError } from './errors/response-errors/not-found.error';
+export { NotImplementedError } from './errors/response-errors/not-implemented.error';
+export { PaymentRequiredError } from './errors/response-errors/payment-required.error';
+export { ScopeForbiddenError } from './errors/response-errors/scope-forbidden.error';
+export { ServiceUnavailableError } from './errors/response-errors/service-unavailable.error';
+export { TooManyRequestsError } from './errors/response-errors/too-many-requests.error';
+export { UnauthenticatedError } from './errors/response-errors/unauthenticated.error';
+export { UnprocessableRequestError } from './errors/response-errors/unprocessable.error';
+export { UnsupportedMediaTypeError } from './errors/response-errors/unsupported-media-type.error';
+export { WorkflowPublishBlockedError } from './errors/response-errors/workflow-publish-blocked.error';

packages/@n8n/backend-services/tsconfig.json

@@ -15,5 +15,9 @@
 		// TODO: remove all options below this line
 		"useUnknownInCatchVariables": false
 	},
-	"include": ["src/**/*.ts", "test/**/*.ts"]
+	"include": ["src/**/*.ts", "test/**/*.ts"],
+	"references": [
+		{ "path": "../../workflow/tsconfig.build.cjs.json" },
+		{ "path": "../api-types/tsconfig.build.json" }
+	]
 }

packages/cli/package.json

@@ -159,6 +159,7 @@
     "@n8n/ai-workflow-builder": "workspace:*",
     "@n8n/api-types": "workspace:*",
     "@n8n/backend-common": "workspace:*",
+    "@n8n/backend-services": "workspace:*",
     "@n8n/backend-network": "workspace:*",
     "@n8n/blob-storage": "workspace:*",
     "@n8n/chat-hub": "workspace:*",

packages/cli/src/__tests__/controller.registry.test.ts

@@ -1,3 +1,4 @@
+import { ForbiddenError } from '@n8n/backend-services';
 vi.mock('@n8n/backend-common', async () => {
 	return {
 		...(await vi.importActual<typeof import('@n8n/backend-common')>('@n8n/backend-common')),
@@ -28,7 +29,6 @@ import { z } from 'zod';
 
 import type { AuthService } from '@/auth/auth.service';
 import { ControllerRegistry } from '@/controller.registry';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
 import type { License } from '@/license';
 import type { LastActiveAtService } from '@/services/last-active-at.service';
 import { RateLimitService } from '@/services/rate-limit.service';

packages/cli/src/__tests__/response-helper.test.ts

@@ -1,14 +1,16 @@
+import {
+	ConflictError,
+	ForbiddenError,
+	InternalServerError,
+	NotFoundError,
+} from '@n8n/backend-services';
 import { mockInstance } from '@n8n/backend-test-utils';
 import type { Request, Response } from 'express';
 import { ErrorReporter } from 'n8n-core';
 import { UserError } from 'n8n-workflow';
 import { mock } from 'vitest-mock-extended';
 
-import { ConflictError } from '@/errors/response-errors/conflict.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
-import { InternalServerError } from '@/errors/response-errors/internal-server.error';
 import { LicenseEulaRequiredError } from '@/errors/response-errors/license-eula-required.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { PolicyViolationError } from '@/policy/policy-violation.error';
 import { reportError, sendErrorResponse } from '@/response-helper';
 

packages/cli/src/__tests__/workflow-helpers.test.ts

@@ -1,4 +1,5 @@
 import { MAX_PINNED_DATA_SIZE, MAX_WORKFLOW_SIZE, MAX_EXPECTED_REQUEST_SIZE } from '@n8n/api-types';
+import { BadRequestError } from '@n8n/backend-services';
 import { mockInstance } from '@n8n/backend-test-utils';
 import type { CredentialsEntity, IExecutionResponse, Project, Variables } from '@n8n/db';
 import { CredentialsRepository } from '@n8n/db';
@@ -32,7 +33,6 @@ import {
 	sanitizeNodeGroupDescriptions,
 	WorkflowStructureBadRequestError,
 } from '@/workflow-helpers';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
 import { mock } from 'vitest-mock-extended';
 
 describe('workflow-helpers', () => {

packages/cli/src/abstract-server.ts

@@ -1,4 +1,5 @@
 import { inDevelopment, inTest, Logger } from '@n8n/backend-common';
+import { ServiceUnavailableError } from '@n8n/backend-services';
 import { GlobalConfig } from '@n8n/config';
 import { DbConnection } from '@n8n/db';
 import { OnShutdown } from '@n8n/decorators';
@@ -12,7 +13,6 @@ import { SLACK_HITL_WEBHOOK_SUFFIX, TELEGRAM_HITL_WEBHOOK_SUFFIX } from 'n8n-cor
 
 import config from '@/config';
 import { N8N_VERSION, TEMPLATES_DIR } from '@/constants';
-import { ServiceUnavailableError } from '@/errors/response-errors/service-unavailable.error';
 import { ExternalHooks } from '@/external-hooks';
 import { bodyParser, corsMiddleware, rawBodyReader } from '@/middlewares';
 import { sendErrorResponse } from '@/response-helper';

packages/cli/src/auth/auth.service.ts

@@ -1,4 +1,5 @@
 import { Logger } from '@n8n/backend-common';
+import { AuthError, ForbiddenError } from '@n8n/backend-services';
 import { GlobalConfig } from '@n8n/config';
 import { Time } from '@n8n/constants';
 import type { AuthenticatedRequest, User } from '@n8n/db';
@@ -12,8 +13,6 @@ import escapeRegExp from 'lodash/escapeRegExp';
 import type { StringValue as TimeUnitValue } from 'ms';
 
 import { AUTH_COOKIE_NAME, RESPONSE_ERROR_MESSAGES } from '@/constants';
-import { AuthError } from '@/errors/response-errors/auth.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
 import { License } from '@/license';
 import { MfaService } from '@/mfa/mfa.service';
 import { JwtService } from '@/services/jwt.service';

packages/cli/src/auth/handlers/__tests__/email.auth-handler.test.ts

@@ -1,8 +1,8 @@
+import { AuthError } from '@n8n/backend-services';
 import type { GlobalConfig } from '@n8n/config';
 import type { AuthIdentity, User, UserRepository } from '@n8n/db';
 import { mock } from 'vitest-mock-extended';
 
-import { AuthError } from '@/errors/response-errors/auth.error';
 import type { EventService } from '@/events/event.service';
 import type { PasswordUtility } from '@/services/password.utility';
 

packages/cli/src/auth/handlers/email.auth-handler.ts

@@ -1,10 +1,10 @@
+import { AuthError } from '@n8n/backend-services';
 import { GlobalConfig } from '@n8n/config';
 import { User, UserRepository } from '@n8n/db';
 import type { IPasswordAuthHandler } from '@n8n/decorators';
 import { AuthHandler } from '@n8n/decorators';
 import { Constructable } from '@n8n/di';
 
-import { AuthError } from '@/errors/response-errors/auth.error';
 import { EventService } from '@/events/event.service';
 import { PasswordUtility } from '@/services/password.utility';
 

packages/cli/src/chat/chat-execution-manager.ts

@@ -1,3 +1,4 @@
+import { NotFoundError } from '@n8n/backend-services';
 import { ExecutionRepository } from '@n8n/db';
 import type { IExecutionResponse, Project } from '@n8n/db';
 import { Service } from '@n8n/di';
@@ -17,7 +18,6 @@ import {
 	isHitlToolType,
 } from 'n8n-workflow';
 
-import { NotFoundError } from '../errors/response-errors/not-found.error';
 import { ExecutionPersistence } from '../executions/execution-persistence';
 import * as WorkflowExecuteAdditionalData from '../workflow-execute-additional-data';
 import { preserveInputOverride } from '../workflow-helpers';

packages/cli/src/collaboration/collaboration.service.ts

@@ -1,5 +1,6 @@
 import type { PushPayload } from '@n8n/api-types';
 import { Logger } from '@n8n/backend-common';
+import { ConflictError, LockedError, NotFoundError } from '@n8n/backend-services';
 import { UserRepository } from '@n8n/db';
 import type { User } from '@n8n/db';
 import { Service } from '@n8n/di';
@@ -22,9 +23,6 @@ import type {
 } from './collaboration.message';
 
 import { CollaborationState, type WriteLock } from '@/collaboration/collaboration.state';
-import { ConflictError } from '@/errors/response-errors/conflict.error';
-import { LockedError } from '@/errors/response-errors/locked.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { AgentRepository } from '@/modules/agents/repositories/agent.repository';
 import { Push } from '@/push';
 import type { OnPushMessage } from '@/push/types';

packages/cli/src/controller.registry.ts

@@ -1,5 +1,6 @@
 import type { ZodClass } from '@n8n/api-types';
 import { inProduction } from '@n8n/backend-common';
+import { NotFoundError, UnauthenticatedError } from '@n8n/backend-services';
 import { GlobalConfig } from '@n8n/config';
 import { type BooleanLicenseFeature } from '@n8n/constants';
 import { isAuthenticatedRequest } from '@n8n/db';
@@ -20,13 +21,11 @@ import assert from 'node:assert';
 
 import { AuthService } from '@/auth/auth.service';
 import { RESPONSE_ERROR_MESSAGES } from '@/constants';
-import { UnauthenticatedError } from '@/errors/response-errors/unauthenticated.error';
 import { License } from '@/license';
 import { userHasScopes } from '@/permissions.ee/check-access';
 import { reportError, send, sendErrorResponse } from '@/response-helper';
 
 import { AbstractServer } from './abstract-server';
-import { NotFoundError } from './errors/response-errors/not-found.error';
 import { CorsService } from './services/cors-service';
 import { LastActiveAtService } from './services/last-active-at.service';
 import { RateLimitService } from './services/rate-limit.service';

packages/cli/src/controllers/__tests__/ai.controller.test.ts

@@ -5,14 +5,16 @@ import type {
 	AiBuilderChatRequestDto,
 	AiGatewayUsageQueryDto,
 } from '@n8n/api-types';
+import {
+	BadRequestError,
+	InternalServerError,
+	NotFoundError,
+	ServiceUnavailableError,
+} from '@n8n/backend-services';
 import type { AuthenticatedRequest } from '@n8n/db';
 import { APIResponseError, NetworkError, type AiAssistantSDK } from '@n8n_io/ai-assistant-sdk';
 import { mock } from 'vitest-mock-extended';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { InternalServerError } from '@/errors/response-errors/internal-server.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
-import { ServiceUnavailableError } from '@/errors/response-errors/service-unavailable.error';
 import type { AiGatewayService } from '@/services/ai-gateway.service';
 import type { AiUsageService } from '@/services/ai-usage.service';
 import type { WorkflowBuilderService } from '@/services/ai-workflow-builder.service';

packages/cli/src/controllers/__tests__/auth.controller.test.ts

@@ -1,6 +1,7 @@
 import type { LoginRequestDto } from '@n8n/api-types';
 import { ResolveSignupTokenQueryDto, SSO_LOGIN_REQUIRED_ERROR_CODE } from '@n8n/api-types';
 import { Logger } from '@n8n/backend-common';
+import { AuthError, BadRequestError, ForbiddenError } from '@n8n/backend-services';
 import { mockInstance } from '@n8n/backend-test-utils';
 import type { AuthenticatedRequest, User } from '@n8n/db';
 import { UserRepository } from '@n8n/db';
@@ -14,9 +15,6 @@ import { AuthService } from '@/auth/auth.service';
 import type { EmailAuthHandler } from '@/auth/handlers/email.auth-handler';
 import config from '@/config';
 import { RESPONSE_ERROR_MESSAGES } from '@/constants';
-import { AuthError } from '@/errors/response-errors/auth.error';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
 import { EventService } from '@/events/event.service';
 import { License } from '@/license';
 import { MfaService } from '@/mfa/mfa.service';

packages/cli/src/controllers/__tests__/change-email.controller.test.ts

@@ -1,4 +1,5 @@
 import { Logger } from '@n8n/backend-common';
+import { BadRequestError, NotFoundError } from '@n8n/backend-services';
 import { mockInstance } from '@n8n/backend-test-utils';
 import type { User } from '@n8n/db';
 import { UserRepository } from '@n8n/db';
@@ -8,8 +9,6 @@ import { mock } from 'vitest-mock-extended';
 
 import { AuthService } from '@/auth/auth.service';
 import { ChangeEmailController } from '@/controllers/change-email.controller';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { EventService } from '@/events/event.service';
 import { ExternalHooks } from '@/external-hooks';
 import type { AuthlessRequest } from '@/requests';

packages/cli/src/controllers/__tests__/invitation.controller.test.ts

@@ -1,6 +1,7 @@
 import type { AcceptInvitationRequestDto } from '@n8n/api-types';
 import { InviteUsersRequestDto } from '@n8n/api-types';
 import { Logger } from '@n8n/backend-common';
+import { BadRequestError } from '@n8n/backend-services';
 import { mockInstance } from '@n8n/backend-test-utils';
 import { UserRepository, GLOBAL_OWNER_ROLE, GLOBAL_MEMBER_ROLE } from '@n8n/db';
 import type { User, PublicUser, AuthenticatedRequest } from '@n8n/db';
@@ -9,7 +10,6 @@ import { v4 as uuidv4 } from 'uuid';
 import { mock } from 'vitest-mock-extended';
 
 import { AuthService } from '@/auth/auth.service';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
 import { EventService } from '@/events/event.service';
 import { ExternalHooks } from '@/external-hooks';
 import { PostHogClient } from '@/posthog';

packages/cli/src/controllers/__tests__/me.controller.test.ts

@@ -1,4 +1,5 @@
 import { UserUpdateRequestDto } from '@n8n/api-types';
+import { BadRequestError, ForbiddenError } from '@n8n/backend-services';
 import { mockInstance } from '@n8n/backend-test-utils';
 import { GlobalConfig } from '@n8n/config';
 import type { AuthenticatedRequest, User, PublicUser, AuthIdentity } from '@n8n/db';
@@ -11,8 +12,6 @@ import { mock, anyObject } from 'vitest-mock-extended';
 
 import { AUTH_COOKIE_NAME } from '@/constants';
 import { MeController } from '@/controllers/me.controller';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
 import { InvalidMfaCodeError } from '@/errors/response-errors/invalid-mfa-code.error';
 import { EventService } from '@/events/event.service';
 import { ExternalHooks } from '@/external-hooks';

packages/cli/src/controllers/__tests__/owner.controller.test.ts

@@ -1,9 +1,9 @@
 import type { DismissBannerRequestDto } from '@n8n/api-types';
+import { BadRequestError } from '@n8n/backend-services';
 import { mock } from 'vitest-mock-extended';
 
 import type { AuthService } from '@/auth/auth.service';
 import { OwnerController } from '@/controllers/owner.controller';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
 import type { PostHogClient } from '@/posthog';
 import type { BannerService } from '@/services/banner.service';
 import type { OwnershipService } from '@/services/ownership.service';

packages/cli/src/controllers/__tests__/role.controller.test.ts

@@ -1,8 +1,8 @@
+import { NotFoundError } from '@n8n/backend-services';
 import type { AuthenticatedRequest, Project } from '@n8n/db';
 import type { Role } from '@n8n/permissions';
 import { mock } from 'vitest-mock-extended';
 
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import type { EventService } from '@/events/event.service';
 import type { ProjectService } from '@/services/project.service.ee';
 import type { RoleService } from '@/services/role.service';

packages/cli/src/controllers/__tests__/security-settings.controller.test.ts

@@ -1,10 +1,10 @@
 import type { UpdateSecuritySettingsDto } from '@n8n/api-types';
 import type { LicenseState } from '@n8n/backend-common';
+import { ForbiddenError } from '@n8n/backend-services';
 import type { InstanceSettingsLoaderConfig } from '@n8n/config';
 import type { AuthenticatedRequest } from '@n8n/db';
 import { mock } from 'vitest-mock-extended';
 
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
 import type { SecuritySettingsService } from '@/services/security-settings.service';
 import type { WorkflowReviewPolicyService } from '@/services/workflow-review-policy.service';
 

packages/cli/src/controllers/__tests__/translation.controller.test.ts

@@ -1,10 +1,10 @@
+import { BadRequestError } from '@n8n/backend-services';
 import type { GlobalConfig } from '@n8n/config';
 import { mock } from 'vitest-mock-extended';
 
 import type { TranslationRequest } from '@/controllers/translation.controller';
 import { TranslationController } from '@/controllers/translation.controller';
 import type { CredentialTypes } from '@/credential-types';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
 
 // The controller loads the translation file via `require(<computed path>)`.
 // Vitest cannot mock a path that doesn't resolve to a real module, so write a

packages/cli/src/controllers/__tests__/users.controller.test.ts

@@ -1,8 +1,8 @@
+import { NotFoundError } from '@n8n/backend-services';
 import type { AuthenticatedRequest, User, UserRepository } from '@n8n/db';
 import type { Response } from 'express';
 import { mock } from 'vitest-mock-extended';
 
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import type { UserRequest } from '@/requests';
 import type { JwtService } from '@/services/jwt.service';
 import type { UrlService } from '@/services/url.service';

packages/cli/src/controllers/ai.controller.ts

@@ -15,6 +15,14 @@ import {
 	AiClearSessionRequestDto,
 	AiGatewayUsageQueryDto,
 } from '@n8n/api-types';
+import {
+	BadRequestError,
+	ContentTooLargeError,
+	InternalServerError,
+	NotFoundError,
+	ServiceUnavailableError,
+	TooManyRequestsError,
+} from '@n8n/backend-services';
 import { AuthenticatedRequest } from '@n8n/db';
 import { Body, Get, Licensed, Post, Query, RestController, GlobalScope } from '@n8n/decorators';
 import { type AiAssistantSDK, APIResponseError, NetworkError } from '@n8n_io/ai-assistant-sdk';
@@ -23,12 +31,6 @@ import { strict as assert } from 'node:assert';
 import { WritableStream } from 'node:stream/web';
 
 import { STREAM_SEPARATOR } from '@/constants';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ContentTooLargeError } from '@/errors/response-errors/content-too-large.error';
-import { InternalServerError } from '@/errors/response-errors/internal-server.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
-import { ServiceUnavailableError } from '@/errors/response-errors/service-unavailable.error';
-import { TooManyRequestsError } from '@/errors/response-errors/too-many-requests.error';
 import { AiGatewayService } from '@/services/ai-gateway.service';
 import { AiUsageService } from '@/services/ai-usage.service';
 import { WorkflowBuilderService } from '@/services/ai-workflow-builder.service';

packages/cli/src/controllers/api-keys.controller.ts

@@ -3,6 +3,7 @@ import {
 	ListApiKeysQueryDto,
 	UpdateApiKeyRequestDto,
 } from '@n8n/api-types';
+import { BadRequestError } from '@n8n/backend-services';
 import { AuthenticatedRequest } from '@n8n/db';
 import {
 	Body,
@@ -18,7 +19,6 @@ import {
 import { getApiKeyScopesForRole } from '@n8n/permissions';
 import type { RequestHandler } from 'express';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
 import { EventService } from '@/events/event.service';
 import { isApiKeyAuthEnabled } from '@/public-api';
 import { PublicApiKeyService } from '@/services/public-api-key.service';

packages/cli/src/controllers/auth.controller.ts

@@ -4,6 +4,12 @@ import {
 	SSO_LOGIN_REQUIRED_ERROR_CODE,
 } from '@n8n/api-types';
 import { Logger } from '@n8n/backend-common';
+import {
+	AuthError,
+	BadRequestError,
+	ForbiddenError,
+	InternalServerError,
+} from '@n8n/backend-services';
 import { Time } from '@n8n/constants';
 import type { User, PublicUser, AuthProviderType } from '@n8n/db';
 import { UserRepository, AuthenticatedRequest, GLOBAL_OWNER_ROLE } from '@n8n/db';
@@ -21,10 +27,6 @@ import { Response } from 'express';
 import { AuthHandlerRegistry } from '@/auth/auth-handler.registry';
 import { AuthService } from '@/auth/auth.service';
 import { RESPONSE_ERROR_MESSAGES } from '@/constants';
-import { AuthError } from '@/errors/response-errors/auth.error';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
-import { InternalServerError } from '@/errors/response-errors/internal-server.error';
 import { EventService } from '@/events/event.service';
 import { License } from '@/license';
 import { MfaService } from '@/mfa/mfa.service';

packages/cli/src/controllers/binary-data.controller.ts

@@ -1,4 +1,5 @@
 import { BinaryDataQueryDto, BinaryDataSignedQueryDto, ViewableMimeTypes } from '@n8n/api-types';
+import { BadRequestError } from '@n8n/backend-services';
 import type { AuthenticatedRequest } from '@n8n/db';
 import { Get, Query, RestController } from '@n8n/decorators';
 import { Request, Response } from 'express';
@@ -11,7 +12,6 @@ import {
 } from 'n8n-core';
 
 import { BinaryDataAccessService } from '@/binary-data/binary-data-access.service';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
 
 @RestController('/binary-data')
 export class BinaryDataController {

packages/cli/src/controllers/change-email.controller.ts

@@ -5,6 +5,7 @@ import {
 	type ChangeEmailResponse,
 } from '@n8n/api-types';
 import { Logger } from '@n8n/backend-common';
+import { BadRequestError, InternalServerError, NotFoundError } from '@n8n/backend-services';
 import { AuthenticatedRequest, UserRepository } from '@n8n/db';
 import {
 	Body,
@@ -17,9 +18,6 @@ import {
 import { Response } from 'express';
 
 import { AuthService } from '@/auth/auth.service';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { InternalServerError } from '@/errors/response-errors/internal-server.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { EventService } from '@/events/event.service';
 import { ExternalHooks } from '@/external-hooks';
 import { AuthlessRequest } from '@/requests';

packages/cli/src/controllers/folder.controller.ts

@@ -5,6 +5,7 @@ import {
 	TransferFolderBodyDto,
 	UpdateFolderDto,
 } from '@n8n/api-types';
+import { BadRequestError, InternalServerError, NotFoundError } from '@n8n/backend-services';
 import { AuthenticatedRequest } from '@n8n/db';
 import {
 	Post,
@@ -24,9 +25,6 @@ import { NextFunction, Response } from 'express';
 import { UserError } from 'n8n-workflow';
 
 import { FolderNotFoundError } from '@/errors/folder-not-found.error';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { InternalServerError } from '@/errors/response-errors/internal-server.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { FolderService } from '@/services/folder.service';
 import { ProjectService } from '@/services/project.service.ee';
 import { EnterpriseWorkflowService } from '@/workflows/workflow.service.ee';

packages/cli/src/controllers/invitation.controller.ts

@@ -1,5 +1,6 @@
 import { AcceptInvitationRequestDto, InviteUsersRequestDto } from '@n8n/api-types';
 import { Logger } from '@n8n/backend-common';
+import { BadRequestError } from '@n8n/backend-services';
 import { Time } from '@n8n/constants';
 import type { User } from '@n8n/db';
 import { UserRepository, AuthenticatedRequest } from '@n8n/db';
@@ -7,7 +8,6 @@ import { Post, GlobalScope, RestController, Body } from '@n8n/decorators';
 import { Response } from 'express';
 
 import { AuthService } from '@/auth/auth.service';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
 import { EventService } from '@/events/event.service';
 import { ExternalHooks } from '@/external-hooks';
 import { PostHogClient } from '@/posthog';

packages/cli/src/controllers/me.controller.ts

@@ -5,6 +5,7 @@ import {
 	UserUpdateRequestDto,
 } from '@n8n/api-types';
 import { Logger } from '@n8n/backend-common';
+import { BadRequestError, ForbiddenError } from '@n8n/backend-services';
 import { GlobalConfig } from '@n8n/config';
 import type { User, PublicUser, AuthIdentity } from '@n8n/db';
 import { UserRepository, AuthenticatedRequest } from '@n8n/db';
@@ -13,8 +14,6 @@ import { plainToInstance } from 'class-transformer';
 import { Response } from 'express';
 
 import { AuthService } from '@/auth/auth.service';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
 import { InvalidMfaCodeError } from '@/errors/response-errors/invalid-mfa-code.error';
 import { EventService } from '@/events/event.service';
 import { ExternalHooks } from '@/external-hooks';

packages/cli/src/controllers/mfa.controller.ts

@@ -1,3 +1,4 @@
+import { BadRequestError, ForbiddenError } from '@n8n/backend-services';
 import { InstanceSettingsLoaderConfig } from '@n8n/config';
 import { AuthenticatedRequest, UserRepository } from '@n8n/db';
 import {
@@ -10,8 +11,6 @@ import {
 import { Response } from 'express';
 
 import { AuthService } from '@/auth/auth.service';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
 import { EventService } from '@/events/event.service';
 import { ExternalHooks } from '@/external-hooks';
 import { MfaService } from '@/mfa/mfa.service';

packages/cli/src/controllers/password-reset.controller.ts

@@ -4,6 +4,13 @@ import {
 	ResolvePasswordTokenQueryDto,
 } from '@n8n/api-types';
 import { Logger } from '@n8n/backend-common';
+import {
+	BadRequestError,
+	ForbiddenError,
+	InternalServerError,
+	NotFoundError,
+	UnprocessableRequestError,
+} from '@n8n/backend-services';
 import { Time } from '@n8n/constants';
 import { GLOBAL_OWNER_ROLE, UserRepository } from '@n8n/db';
 import {
@@ -20,11 +27,6 @@ import { ErrorReporter } from 'n8n-core';
 
 import { AuthService } from '@/auth/auth.service';
 import { RESPONSE_ERROR_MESSAGES } from '@/constants';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
-import { InternalServerError } from '@/errors/response-errors/internal-server.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
-import { UnprocessableRequestError } from '@/errors/response-errors/unprocessable.error';
 import { EventService } from '@/events/event.service';
 import { ExternalHooks } from '@/external-hooks';
 import { License } from '@/license';

packages/cli/src/controllers/project.controller.ts

@@ -6,6 +6,7 @@ import {
 	ChangeUserRoleInProject,
 	ListProjectsQueryDto,
 } from '@n8n/api-types';
+import { BadRequestError, ForbiddenError, NotFoundError } from '@n8n/backend-services';
 import { AuthenticatedRequest } from '@n8n/db';
 import {
 	Get,
@@ -23,9 +24,6 @@ import {
 import { combineScopes, getAuthPrincipalScopes } from '@n8n/permissions';
 import { Response } from 'express';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { ProvisioningService } from '@/modules/provisioning.ee/provisioning.service.ee';
 import type { ProjectRequest } from '@/requests';
 import {

packages/cli/src/controllers/role.controller.ts

@@ -13,6 +13,7 @@ import type {
 	RoleMembersResponse,
 	RoleProjectMembersResponse,
 } from '@n8n/api-types';
+import { NotFoundError } from '@n8n/backend-services';
 import { LICENSE_FEATURES } from '@n8n/constants';
 import { AuthenticatedRequest } from '@n8n/db';
 import {
@@ -29,7 +30,6 @@ import {
 } from '@n8n/decorators';
 import { Role as RoleDTO } from '@n8n/permissions';
 
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { EventService } from '@/events/event.service';
 import { ProjectService } from '@/services/project.service.ee';
 import { assertCanManageRoleType, canReassignUsers } from '@/services/role-authorization';

packages/cli/src/controllers/security-settings.controller.ts

@@ -1,11 +1,11 @@
 import { UpdateSecuritySettingsDto } from '@n8n/api-types';
 import { LicenseState } from '@n8n/backend-common';
+import { ForbiddenError } from '@n8n/backend-services';
 import { InstanceSettingsLoaderConfig } from '@n8n/config';
 import { type AuthenticatedRequest } from '@n8n/db';
 import { Body, Get, GlobalScope, Licensed, Post, RestController } from '@n8n/decorators';
 import type { Response } from 'express';
 
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
 import { SecuritySettingsService } from '@/services/security-settings.service';
 import { WorkflowReviewPolicyService } from '@/services/workflow-review-policy.service';
 

packages/cli/src/controllers/translation.controller.ts

@@ -1,4 +1,5 @@
 import { safeJoinPath } from '@n8n/backend-common';
+import { BadRequestError, InternalServerError } from '@n8n/backend-services';
 import { GlobalConfig } from '@n8n/config';
 import { Get, RestController } from '@n8n/decorators';
 import type { Request } from 'express';
@@ -6,8 +7,6 @@ import { access } from 'fs/promises';
 
 import { NODES_BASE_DIR } from '@/constants';
 import { CredentialTypes } from '@/credential-types';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { InternalServerError } from '@/errors/response-errors/internal-server.error';
 
 export const CREDENTIAL_TRANSLATIONS_DIR = 'n8n-nodes-base/dist/credentials/translations';
 export const NODE_HEADERS_PATH = safeJoinPath(NODES_BASE_DIR, 'dist/nodes/headers');

packages/cli/src/controllers/user-settings.controller.ts

@@ -1,7 +1,7 @@
+import { BadRequestError } from '@n8n/backend-services';
 import { Patch, RestController } from '@n8n/decorators';
 import type { NpsSurveyState } from 'n8n-workflow';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
 import { NpsSurveyRequest } from '@/requests';
 import { UserService } from '@/services/user.service';
 

packages/cli/src/controllers/users.controller.ts

@@ -6,6 +6,7 @@ import {
 	UsersListFilterDto,
 	usersListSchema,
 } from '@n8n/api-types';
+import { ForbiddenError, NotFoundError } from '@n8n/backend-services';
 import type { PublicUser } from '@n8n/db';
 import {
 	User,
@@ -30,8 +31,6 @@ import { hasGlobalScope } from '@n8n/permissions';
 import { Response } from 'express';
 
 import { AuthService } from '@/auth/auth.service';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { UserRequest } from '@/requests';
 import { JwtService } from '@/services/jwt.service';
 import { UrlService } from '@/services/url.service';

packages/cli/src/controllers/workflow-statistics.controller.ts

@@ -1,10 +1,10 @@
 import { Logger } from '@n8n/backend-common';
+import { NotFoundError } from '@n8n/backend-services';
 import type { WorkflowStatistics } from '@n8n/db';
 import { StatisticsNames, WorkflowStatisticsRepository } from '@n8n/db';
 import { Get, Middleware, RestController } from '@n8n/decorators';
 import { Response, NextFunction } from 'express';
 
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import type { IWorkflowStatisticsDataLoaded } from '@/interfaces';
 import { WorkflowFinderService } from '@/workflows/workflow-finder.service';
 

packages/cli/src/credentials/__tests__/credentials.controller.test.ts

@@ -1,3 +1,4 @@
+import { BadRequestError, NotFoundError } from '@n8n/backend-services';
 import type { Response } from 'express';
 import { CredentialDescriptionsService } from '@/credentials/credential-descriptions.service';
 import type { PostHogClient } from '@/posthog';
@@ -20,8 +21,6 @@ import { GLOBAL_OWNER_ROLE, GLOBAL_MEMBER_ROLE } from '@n8n/db';
 import type { Scope } from '@n8n/permissions';
 import { mock } from 'vitest-mock-extended';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import * as checkAccess from '@/permissions.ee/check-access';
 import type { CredentialRequest } from '@/requests';
 

packages/cli/src/credentials/__tests__/credentials.service.test.ts

@@ -2,6 +2,7 @@ import { CredentialDescriptionsService } from '@/credentials/credential-descript
 import type { PostHogClient } from '@/posthog';
 import { CREDENTIAL_DESCRIPTION_MAX_LENGTH } from '@n8n/api-types';
 import type { Logger } from '@n8n/backend-common';
+import { BadRequestError, ForbiddenError } from '@n8n/backend-services';
 import type {
 	CredentialsRepository,
 	ICredentialsDb,
@@ -51,8 +52,6 @@ import type { CredentialsHelper } from '@/credentials-helper';
 import type { PolicyEnforcementService } from '@/policy/policy-enforcement.service';
 import { PolicyViolationError } from '@/policy/policy-violation.error';
 import { CredentialNotFoundError } from '@/errors/credential-not-found.error';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
 import type { EventService } from '@/events/event.service';
 import type { ExternalHooks } from '@/external-hooks';
 import type { ExternalSecretsConfig } from '@/modules/external-secrets.ee/external-secrets.config';

packages/cli/src/credentials/credentials.controller.ts

@@ -6,6 +6,7 @@ import {
 	TestCredentialRequestDto,
 } from '@n8n/api-types';
 import { LicenseState, Logger } from '@n8n/backend-common';
+import { BadRequestError, ForbiddenError, NotFoundError } from '@n8n/backend-services';
 import { GlobalConfig } from '@n8n/config';
 import {
 	SharedCredentials,
@@ -42,9 +43,6 @@ import { getExternalSecretExpressionPaths } from './external-secrets.utils';
 
 import { CredentialsOverwrites } from '@/credentials-overwrites';
 import { CredentialNotFoundError } from '@/errors/credential-not-found.error';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { EventService } from '@/events/event.service';
 import { listQueryMiddleware } from '@/middlewares';
 import { userHasScopes } from '@/permissions.ee/check-access';

packages/cli/src/credentials/credentials.service.ee.ts

@@ -1,5 +1,6 @@
 import type { CredentialConnectionStatus } from '@n8n/api-types';
 import { LicenseState } from '@n8n/backend-common';
+import { NotFoundError } from '@n8n/backend-services';
 import type { User } from '@n8n/db';
 import {
 	CredentialsEntity,
@@ -12,7 +13,6 @@ import { hasGlobalScope } from '@n8n/permissions';
 import { In, type EntityManager } from '@n8n/typeorm';
 import type { ICredentialDataDecryptedObject } from 'n8n-workflow';
 
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { TransferCredentialError } from '@/errors/response-errors/transfer-credential.error';
 import { ExternalSecretsConfig } from '@/modules/external-secrets.ee/external-secrets.config';
 import { SecretsProviderAccessCheckService } from '@/modules/external-secrets.ee/secret-provider-access-check.service.ee';

packages/cli/src/credentials/credentials.service.ts

@@ -1,5 +1,11 @@
 import type { CreateCredentialDto, CredentialConnectionStatus } from '@n8n/api-types';
 import { Logger } from '@n8n/backend-common';
+import {
+	BadRequestError,
+	ConflictError,
+	ForbiddenError,
+	NotFoundError,
+} from '@n8n/backend-services';
 import { Time } from '@n8n/constants';
 import {
 	Project,
@@ -60,10 +66,6 @@ import { isCredSharingEnabled } from '@/constants/credential-sharing';
 import { CredentialTypes } from '@/credential-types';
 import { createCredentialsFromCredentialsEntity, CredentialsHelper } from '@/credentials-helper';
 import { CredentialNotFoundError } from '@/errors/credential-not-found.error';
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ConflictError } from '@/errors/response-errors/conflict.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { EventService } from '@/events/event.service';
 import { ExternalHooks } from '@/external-hooks';
 import { validateEntity } from '@/generic-helpers';

packages/cli/src/credentials/instance-credential-broker.ts

@@ -1,4 +1,5 @@
 import { Logger } from '@n8n/backend-common';
+import { UnprocessableRequestError } from '@n8n/backend-services';
 import {
 	CredentialsEntity,
 	InstanceCredentialAssignmentRepository,
@@ -7,8 +8,6 @@ import {
 import { Service } from '@n8n/di';
 import type { ICredentialDataDecryptedObject } from 'n8n-workflow';
 
-import { UnprocessableRequestError } from '@/errors/response-errors/unprocessable.error';
-
 import { CredentialsService } from './credentials.service';
 import {
 	InstanceCredentialUseRegistry,

packages/cli/src/credentials/validation.ts

@@ -1,9 +1,9 @@
 import { credentialDescriptionSchema } from '@n8n/api-types';
+import { BadRequestError } from '@n8n/backend-services';
 import type { User } from '@n8n/db';
 import get from 'lodash/get';
 import { type ICredentialDataDecryptedObject } from 'n8n-workflow';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
 import type { SecretsProviderAccessCheckService } from '@/modules/external-secrets.ee/secret-provider-access-check.service.ee';
 import { userHasScopes } from '@/permissions.ee/check-access';
 

packages/cli/src/encryption/__tests__/key-manager.service.test.ts

@@ -1,4 +1,5 @@
 import { Logger } from '@n8n/backend-common';
+import { NotFoundError } from '@n8n/backend-services';
 import { mockInstance } from '@n8n/backend-test-utils';
 import type { DeploymentKey } from '@n8n/db';
 import { DeploymentKeyRepository } from '@n8n/db';
@@ -7,7 +8,6 @@ import { Cipher, type EncryptionKeyProxy, InstanceSettings } from 'n8n-core';
 import { randomBytes } from 'node:crypto';
 import { mock } from 'vitest-mock-extended';
 
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { KeyManagerService } from '@/encryption/key-manager.service';
 
 const makeKey = (overrides: Partial<DeploymentKey> = {}): DeploymentKey =>

packages/cli/src/encryption/key-manager.service.ts

@@ -1,5 +1,6 @@
 import type { ListEncryptionKeysQueryDto } from '@n8n/api-types';
 import { Logger } from '@n8n/backend-common';
+import { NotFoundError } from '@n8n/backend-services';
 import {
 	DeploymentKeyRepository,
 	type DeploymentKey,
@@ -16,8 +17,6 @@ import {
 } from 'n8n-core';
 import { randomBytes } from 'node:crypto';
 
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
-
 import { isKeyRotationEnabled } from './key-rotation-flag';
 
 /** Raw DEK format: 64 hex chars stored directly as key material (n8n 2.18.x). */

packages/cli/src/environments.ee/variables/variables.controller.ee.ts

@@ -3,12 +3,11 @@ import {
 	UpdateVariableRequestDto,
 	VariableListRequestDto,
 } from '@n8n/api-types';
+import { BadRequestError, NotFoundError } from '@n8n/backend-services';
 import { AuthenticatedRequest } from '@n8n/db';
 import { Body, Delete, Get, Licensed, Patch, Post, Query, RestController } from '@n8n/decorators';
 import type { Response } from 'express';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { VariableCountLimitReachedError } from '@/errors/variable-count-limit-reached.error';
 import { VariableValidationError } from '@/errors/variable-validation.error';
 

packages/cli/src/environments.ee/variables/variables.service.ee.ts

@@ -4,6 +4,7 @@ import {
 	NEW_VARIABLE_KEY_REGEX,
 } from '@n8n/api-types';
 import { LicenseState } from '@n8n/backend-common';
+import { ForbiddenError, NotFoundError } from '@n8n/backend-services';
 import { UNLIMITED_LICENSE_QUOTA } from '@n8n/constants';
 import type { User, Variables } from '@n8n/db';
 import { generateNanoId, VariablesRepository } from '@n8n/db';
@@ -11,8 +12,6 @@ import { Service } from '@n8n/di';
 import { hasGlobalScope, Scope } from '@n8n/permissions';
 
 import { FeatureNotLicensedError } from '@/errors/feature-not-licensed.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { VariableCountLimitReachedError } from '@/errors/variable-count-limit-reached.error';
 import { VariableValidationError } from '@/errors/variable-validation.error';
 import { EventService } from '@/events/event.service';

packages/cli/src/errors/__tests__/http-error-classifier.test.ts

@@ -1,9 +1,8 @@
+import { BadRequestError, NotFoundError } from '@n8n/backend-services';
 import { BadRequest, Unauthorized } from 'express-openapi-validator/dist/framework/types';
 import { OperationalError, UnexpectedError, UserError } from 'n8n-workflow';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
 import { LicenseEulaRequiredError } from '@/errors/response-errors/license-eula-required.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 
 import { classifyHttpError, HttpErrorKind, isResponseError } from '../http-error-classifier';
 

packages/cli/src/errors/__tests__/http-error-serializers.test.ts

@@ -1,4 +1,5 @@
 import type { SourceControlledFile } from '@n8n/api-types';
+import { ConflictError, NotFoundError, WorkflowPublishBlockedError } from '@n8n/backend-services';
 import { UnexpectedError, UserError } from 'n8n-workflow';
 
 import { classifyHttpError } from '@/errors/http-error-classifier';
@@ -6,10 +7,7 @@ import {
 	serializeInternalRestError,
 	serializePublicApiError,
 } from '@/errors/http-error-serializers';
-import { ConflictError } from '@/errors/response-errors/conflict.error';
 import { LicenseEulaRequiredError } from '@/errors/response-errors/license-eula-required.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
-import { WorkflowPublishBlockedError } from '@/errors/response-errors/workflow-publish-blocked.error';
 import { toImportBlockedError } from '@/modules/n8n-packages/engine/import-blocked.error';
 import { PolicyViolationError } from '@/policy/policy-violation.error';
 

packages/cli/src/errors/http-error-classifier.ts

@@ -1,8 +1,7 @@
+import { ResponseError } from '@n8n/backend-services';
 import { HttpError, Unauthorized } from 'express-openapi-validator/dist/framework/types';
 import { UnexpectedError, UserError } from 'n8n-workflow';
 
-import { ResponseError } from '@/errors/response-errors/abstract/response.error';
-
 export const enum HttpErrorKind {
 	responseError = 'responseError',
 	userError = 'userError',

packages/cli/src/errors/response-errors/ai-preference-scope-full.error.ts

@@ -1,6 +1,5 @@
 import type { AiPreferenceScope } from '@n8n/api-types';
-
-import { BadRequestError } from './bad-request.error';
+import { BadRequestError } from '@n8n/backend-services';
 
 /** The per-scope cap refused a preference write. `meta` stays out of the REST body. */
 export class AiPreferenceScopeFullError extends BadRequestError {

packages/cli/src/errors/response-errors/incompatible-nodes-api-version.error.ts

@@ -1,4 +1,4 @@
-import { ResponseError } from './abstract/response.error';
+import { ResponseError } from '@n8n/backend-services';
 
 /**
  * A community package requires a node-authoring API version this runtime does

packages/cli/src/errors/response-errors/invalid-mfa-code.error.ts

@@ -1,4 +1,4 @@
-import { ForbiddenError } from './forbidden.error';
+import { ForbiddenError } from '@n8n/backend-services';
 
 export class InvalidMfaCodeError extends ForbiddenError {
 	constructor(hint?: string) {

packages/cli/src/errors/response-errors/invalid-mfa-recovery-code-error.ts

@@ -1,4 +1,4 @@
-import { ForbiddenError } from './forbidden.error';
+import { ForbiddenError } from '@n8n/backend-services';
 
 export class InvalidMfaRecoveryCodeError extends ForbiddenError {
 	constructor(hint?: string) {

packages/cli/src/errors/response-errors/license-eula-required.error.ts

@@ -1,4 +1,4 @@
-import { ResponseError } from './abstract/response.error';
+import { ResponseError } from '@n8n/backend-services';
 
 /**
  * Error thrown when license activation requires EULA acceptance.

packages/cli/src/errors/response-errors/transfer-credential.error.ts

@@ -1,4 +1,4 @@
-import { ResponseError } from './abstract/response.error';
+import { ResponseError } from '@n8n/backend-services';
 
 export class TransferCredentialError extends ResponseError {
 	constructor(message: string) {

packages/cli/src/errors/response-errors/transfer-workflow.error.ts

@@ -1,4 +1,4 @@
-import { ResponseError } from './abstract/response.error';
+import { ResponseError } from '@n8n/backend-services';
 
 export class TransferWorkflowError extends ResponseError {
 	constructor(message: string) {

packages/cli/src/errors/response-errors/webhook-not-found.error.ts

@@ -1,4 +1,4 @@
-import { NotFoundError } from './not-found.error';
+import { NotFoundError } from '@n8n/backend-services';
 
 export const webhookNotFoundErrorMessage = ({
 	path,

packages/cli/src/errors/response-errors/workflow-activation-bad-request.error.ts

@@ -1,4 +1,4 @@
-import { BadRequestError } from './bad-request.error';
+import { BadRequestError } from '@n8n/backend-services';
 
 /**
  * Error thrown when a workflow fails to activate due to a node-level error.

packages/cli/src/errors/response-errors/workflow-deactivation-bad-request.error.ts

@@ -1,4 +1,4 @@
-import { BadRequestError } from './bad-request.error';
+import { BadRequestError } from '@n8n/backend-services';
 
 /**
  * Error thrown when a workflow fails to deactivate, e.g. because a

packages/cli/src/errors/response-errors/workflow-publish-forbidden.error.ts

@@ -2,8 +2,7 @@ import type {
 	WorkflowPublishForbiddenDetails,
 	WorkflowPublishForbiddenReason,
 } from '@n8n/api-types';
-
-import { ForbiddenError } from './forbidden.error';
+import { ForbiddenError } from '@n8n/backend-services';
 
 const messages: Record<WorkflowPublishForbiddenReason, string> = {
 	insufficient_api_key_scope:

packages/cli/src/evaluation.ee/__tests__/evaluation-collection.service.test.ts

@@ -1,5 +1,6 @@
 import type { CreateEvaluationCollectionPayload } from '@n8n/api-types';
 import type { Logger } from '@n8n/backend-common';
+import { BadRequestError, NotFoundError } from '@n8n/backend-services';
 import { DbLock } from '@n8n/db';
 import type {
 	DbLockService,
@@ -20,8 +21,6 @@ import { OperationalError } from 'n8n-workflow';
 import type { Mocked } from 'vitest';
 import { mock } from 'vitest-mock-extended';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import type { Telemetry } from '@/telemetry';
 import type { WorkflowHistoryService } from '@/workflows/workflow-history/workflow-history.service';
 

packages/cli/src/evaluation.ee/__tests__/evaluation-collections.controller.test.ts

@@ -1,13 +1,12 @@
 import { EVAL_COLLECTIONS_FLAG } from '@n8n/api-types';
 import type { Logger } from '@n8n/backend-common';
+import { BadRequestError, NotFoundError } from '@n8n/backend-services';
 import type { AuthenticatedRequest, User } from '@n8n/db';
 import { ControllerRegistryMetadata } from '@n8n/decorators';
 import { Container } from '@n8n/di';
 import type { Mocked } from 'vitest';
 import { mock } from 'vitest-mock-extended';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import type { PostHogClient } from '@/posthog';
 
 import type { EvaluationCollectionService } from '../evaluation-collection.service';

packages/cli/src/evaluation.ee/__tests__/evaluation-config.controller.test.ts

@@ -1,9 +1,8 @@
+import { BadRequestError, NotFoundError } from '@n8n/backend-services';
 import type { Mocked } from 'vitest';
 import type { AuthenticatedRequest, EvaluationConfig, User, WorkflowEntity } from '@n8n/db';
 import { mock } from 'vitest-mock-extended';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import type { WorkflowFinderService } from '@/workflows/workflow-finder.service';
 
 import { EvaluationApiError } from '../evaluation-api-error';

packages/cli/src/evaluation.ee/__tests__/evaluation-dataset.service.test.ts

@@ -1,3 +1,4 @@
+import { BadRequestError, ForbiddenError, NotFoundError } from '@n8n/backend-services';
 import type { Mocked, MockedFunction } from 'vitest';
 import type { AddDatasetRowDto } from '@n8n/api-types';
 import type { EvaluationConfig, IExecutionResponse, User } from '@n8n/db';
@@ -5,9 +6,6 @@ import type { EvaluationConfigRepository } from '@n8n/db';
 import { mock } from 'vitest-mock-extended';
 import type { IConnections, IRunData } from 'n8n-workflow';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import type { ExecutionPersistence } from '@/executions/execution-persistence';
 import type { DataTableColumn } from '@/modules/data-table/data-table-column.entity';
 import type { DataTableService } from '@/modules/data-table/data-table.service';

packages/cli/src/evaluation.ee/__tests__/evaluation-test-run.service.test.ts

@@ -1,4 +1,5 @@
 import type { LicenseState } from '@n8n/backend-common';
+import { PaymentRequiredError } from '@n8n/backend-services';
 import { UNLIMITED_LICENSE_QUOTA } from '@n8n/constants';
 import type {
 	TestCaseExecution,
@@ -10,8 +11,6 @@ import type {
 import type { Mocked } from 'vitest';
 import { mock } from 'vitest-mock-extended';
 
-import { PaymentRequiredError } from '@/errors/response-errors/payment-required.error';
-
 import { EvaluationTestRunService } from '../evaluation-test-run.service';
 
 describe('EvaluationTestRunService', () => {

packages/cli/src/evaluation.ee/__tests__/test-runs.controller.ee.test.ts

@@ -1,3 +1,4 @@
+import { ConflictError, NotFoundError } from '@n8n/backend-services';
 import type { Mock, Mocked } from 'vitest';
 import type {
 	EvaluationConfigRepository,
@@ -8,8 +9,6 @@ import type {
 } from '@n8n/db';
 import type express from 'express';
 
-import { ConflictError } from '@/errors/response-errors/conflict.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import type { TestRunnerService } from '@/evaluation.ee/test-runner/test-runner.service.ee';
 import { TestRunsController } from '@/evaluation.ee/test-runs.controller.ee';
 import type { TestRunsRequest } from '@/evaluation.ee/test-runs.types.ee';

packages/cli/src/evaluation.ee/evaluation-collection.service.ts

@@ -10,6 +10,7 @@ import type {
 } from '@n8n/api-types';
 import { metricScalesFromConfig, normalizeMetricScore } from '@n8n/api-types';
 import { Logger } from '@n8n/backend-common';
+import { BadRequestError, NotFoundError } from '@n8n/backend-services';
 import type { EvaluationConfig, TestRun, User } from '@n8n/db';
 import {
 	DbLock,
@@ -25,8 +26,6 @@ import { In } from '@n8n/typeorm';
 import { OperationalError, type IDataObject } from 'n8n-workflow';
 import { nanoid } from 'nanoid';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { TestRunnerService } from '@/evaluation.ee/test-runner/test-runner.service.ee';
 import { Telemetry } from '@/telemetry';
 import { WorkflowHistoryService } from '@/workflows/workflow-history/workflow-history.service';

packages/cli/src/evaluation.ee/evaluation-collections.controller.ee.ts

@@ -5,11 +5,10 @@ import {
 	UpdateEvaluationCollectionDto,
 } from '@n8n/api-types';
 import { Logger } from '@n8n/backend-common';
+import { BadRequestError, NotFoundError } from '@n8n/backend-services';
 import type { AuthenticatedRequest, User } from '@n8n/db';
 import { Body, Delete, Get, Patch, Post, ProjectScope, RestController } from '@n8n/decorators';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { PostHogClient } from '@/posthog';
 
 import { EvaluationCollectionService } from './evaluation-collection.service';

packages/cli/src/evaluation.ee/evaluation-config.controller.ts

@@ -1,9 +1,8 @@
 import { addDatasetRowSchema, upsertEvaluationConfigSchema } from '@n8n/api-types';
+import { BadRequestError, NotFoundError } from '@n8n/backend-services';
 import type { AuthenticatedRequest, User } from '@n8n/db';
 import { Delete, Get, Post, Put, RestController } from '@n8n/decorators';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { WorkflowFinderService } from '@/workflows/workflow-finder.service';
 
 import { EvaluationConfigService } from './evaluation-config.service';

packages/cli/src/evaluation.ee/evaluation-dataset.service.ts

@@ -4,6 +4,7 @@ import type {
 	DatasetCandidateResponse,
 	DatasetColumnMapping,
 } from '@n8n/api-types';
+import { BadRequestError, ForbiddenError, NotFoundError } from '@n8n/backend-services';
 import type { EvaluationConfig, User } from '@n8n/db';
 import { EvaluationConfigRepository } from '@n8n/db';
 import { Service } from '@n8n/di';
@@ -23,9 +24,6 @@ import type {
 	JsonValue,
 } from 'n8n-workflow';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { ExecutionPersistence } from '@/executions/execution-persistence';
 import type { DataTableColumn } from '@/modules/data-table/data-table-column.entity';
 import { DataTableService } from '@/modules/data-table/data-table.service';

packages/cli/src/evaluation.ee/evaluation-test-run.service.ts

@@ -1,11 +1,10 @@
 import { LicenseState } from '@n8n/backend-common';
+import { PaymentRequiredError } from '@n8n/backend-services';
 import { UNLIMITED_LICENSE_QUOTA } from '@n8n/constants';
 import type { TestRun } from '@n8n/db';
 import { TestCaseExecutionRepository, TestRunRepository, WorkflowRepository } from '@n8n/db';
 import { Service } from '@n8n/di';
 
-import { PaymentRequiredError } from '@/errors/response-errors/payment-required.error';
-
 type Pagination = { offset: number; limit: number };
 
 /**

packages/cli/src/evaluation.ee/insights/__tests__/eval-insights.controller.test.ts

@@ -1,13 +1,13 @@
 import type { GenerateInsightsDto } from '@n8n/api-types';
 import { EVAL_COLLECTIONS_FLAG } from '@n8n/api-types';
 import type { Logger } from '@n8n/backend-common';
+import { NotFoundError } from '@n8n/backend-services';
 import type { AuthenticatedRequest, User } from '@n8n/db';
 import { ControllerRegistryMetadata } from '@n8n/decorators';
 import { Container } from '@n8n/di';
 import type { Mocked } from 'vitest';
 import { mock } from 'vitest-mock-extended';
 
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import type { PostHogClient } from '@/posthog';
 
 import { EvalInsightsController } from '../eval-insights.controller.ee';

packages/cli/src/evaluation.ee/insights/__tests__/eval-insights.service.test.ts

@@ -1,5 +1,6 @@
 import type { AiInsightsResponse } from '@n8n/api-types';
 import type { LicenseState, Logger } from '@n8n/backend-common';
+import { BadRequestError, ForbiddenError, NotFoundError } from '@n8n/backend-services';
 import type {
 	EvaluationCollection,
 	EvaluationCollectionRepository,
@@ -10,9 +11,6 @@ import type {
 import type { Mocked } from 'vitest';
 import { mock } from 'vitest-mock-extended';
 
-import { BadRequestError } from '@/errors/response-errors/bad-request.error';
-import { ForbiddenError } from '@/errors/response-errors/forbidden.error';
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import type { Telemetry } from '@/telemetry';
 
 import { DETERMINISTIC_MODEL_TAG, EvalInsightsService } from '../eval-insights.service';

packages/cli/src/evaluation.ee/insights/eval-insights.controller.ee.ts

@@ -1,9 +1,9 @@
 import { EVAL_COLLECTIONS_FLAG, GenerateInsightsDto } from '@n8n/api-types';
 import { Logger } from '@n8n/backend-common';
+import { NotFoundError } from '@n8n/backend-services';
 import type { AuthenticatedRequest, User } from '@n8n/db';
 import { Body, Post, ProjectScope, RestController } from '@n8n/decorators';
 
-import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { PostHogClient } from '@/posthog';
 
 import { EvalInsightsService } from './eval-insights.service';