fix(core)!: Make runners the only Code node option (#22689)

packages/@n8n/config/src/configs/runners.config.ts

@@ -8,8 +8,7 @@ export type TaskRunnerMode = z.infer<typeof runnerModeSchema>;
 
 @Config
 export class TaskRunnersConfig {
-	@Env('N8N_RUNNERS_ENABLED')
-	enabled: boolean = false;
+	enabled: boolean = true;
 
 	/**
 	 * Whether the task runner should run as a child process spawned by n8n (internal mode)

packages/@n8n/config/test/config.test.ts

@@ -263,7 +263,7 @@ describe('GlobalConfig', () => {
 			},
 		},
 		taskRunners: {
-			enabled: false,
+			enabled: true,
 			mode: 'internal',
 			path: '/runners',
 			authToken: '',

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

@@ -83,33 +83,6 @@ describe('DeprecationService', () => {
 		toTest('DB_TYPE', dbType, mustWarn);
 	});
 
-	describe('N8N_RUNNERS_ENABLED', () => {
-		const envVar = 'N8N_RUNNERS_ENABLED';
-
-		test.each([
-			['false', true],
-			['', true],
-			['true', false],
-			[undefined /* warnIfMissing */, true],
-		])('should handle value: %s', (value, mustWarn) => {
-			toTest(envVar, value, mustWarn);
-		});
-
-		test('should not warn when Code node is excluded', () => {
-			process.env[envVar] = 'false';
-
-			const globalConfig = mockInstance(GlobalConfig, {
-				nodes: {
-					exclude: ['n8n-nodes-base.code'],
-				},
-			});
-
-			new DeprecationService(logger, globalConfig, instanceSettings).warn();
-
-			expect(logger.warn).not.toHaveBeenCalled();
-		});
-	});
-
 	describe('OFFLOAD_MANUAL_EXECUTIONS_TO_WORKERS', () => {
 		const envVar = 'OFFLOAD_MANUAL_EXECUTIONS_TO_WORKERS';
 

packages/cli/src/deprecation/deprecation.service.ts

@@ -55,14 +55,6 @@ export class DeprecationService {
 			envVar: 'N8N_SKIP_WEBHOOK_DEREGISTRATION_SHUTDOWN',
 			message: `n8n no longer deregisters webhooks at startup and shutdown. ${SAFE_TO_REMOVE}`,
 		},
-		{
-			envVar: 'N8N_RUNNERS_ENABLED',
-			message:
-				'Running n8n without task runners is deprecated. Task runners will be turned on by default in a future version. Please set `N8N_RUNNERS_ENABLED=true` to enable task runners now and avoid potential issues in the future. Learn more: https://docs.n8n.io/hosting/configuration/task-runners/',
-			checkValue: (value?: string) => value?.toLowerCase() !== 'true' && value !== '1',
-			warnIfMissing: true,
-			disableIf: () => this.globalConfig.nodes.exclude.includes('n8n-nodes-base.code'),
-		},
 		{
 			envVar: 'OFFLOAD_MANUAL_EXECUTIONS_TO_WORKERS',
 			message:

packages/core/test/setup-mocks.ts

@@ -1 +1,8 @@
 import 'reflect-metadata';
+import { TaskRunnersConfig } from '@n8n/config';
+import { Container } from '@n8n/di';
+
+// Disable task runners for tests until proper mocking is implemented
+const taskRunnersConfig = new TaskRunnersConfig();
+taskRunnersConfig.enabled = false;
+Container.set(TaskRunnersConfig, taskRunnersConfig);

packages/nodes-base/test/setup.ts

@@ -1,8 +1,13 @@
 import 'reflect-metadata';
+import { TaskRunnersConfig } from '@n8n/config';
+import { Container } from '@n8n/di';
 
 // Disable task runners until we have fixed the "run test workflows" test
 // to mock the Code Node execution
-process.env.N8N_RUNNERS_ENABLED = 'false';
+const taskRunnersConfig = new TaskRunnersConfig();
+taskRunnersConfig.enabled = false;
+Container.set(TaskRunnersConfig, taskRunnersConfig);
+
 process.env.N8N_ENFORCE_SETTINGS_FILE_PERMISSIONS = 'false';
 process.env.N8N_VERSION = '0.0.0-test';
 // Disable file access restrictions for tests so they can read/write test files