fix(toolkit-lib): drift detection options are unnecessarily required

packages/@aws-cdk/toolkit-lib/lib/actions/drift/index.ts

@@ -2,9 +2,11 @@ import type { StackSelector } from '../../api/cloud-assembly';
 
 export interface DriftOptions {
   /**
-   * Criteria for selecting stacks to check for drift
+   * Select stacks to check for drift
+   *
+   * @default - all stacks
    */
-  readonly stacks: StackSelector;
+  readonly stacks?: StackSelector;
 }
 
 /**

packages/@aws-cdk/toolkit-lib/lib/toolkit/toolkit.ts

@@ -382,7 +382,7 @@ export class Toolkit extends CloudAssemblySourceBuilder {
   /**
    * Drift Action
    */
-  public async drift(cx: ICloudAssemblySource, options: DriftOptions): Promise<{ [name: string]: DriftResult }> {
+  public async drift(cx: ICloudAssemblySource, options: DriftOptions = {}): Promise<{ [name: string]: DriftResult }> {
     const ioHelper = asIoHelper(this.ioHost, 'drift');
     const selectStacks = options.stacks ?? ALL_STACKS;
     const synthSpan = await ioHelper.span(SPAN.SYNTH_ASSEMBLY).begin({ stacks: selectStacks });

packages/@aws-cdk/toolkit-lib/test/actions/drift.test.ts

@@ -73,4 +73,19 @@ describe('drift', () => {
     ioHost.expectMessage({ containing: 'Modified Resources', level: 'info' });
     ioHost.expectMessage({ containing: '[~] AWS::S3::Bucket MyBucket MyBucketF68F3FF0', level: 'info' });
   });
+
+  test('can invoke drift action without options', async () => {
+    // GIVEN
+    mockCloudFormationClient.on(DetectStackDriftCommand).resolves({ StackDriftDetectionId: '12345' });
+    mockCloudFormationClient.on(DescribeStackDriftDetectionStatusCommand).resolves({ DetectionStatus: 'DETECTION_COMPLETE' });
+    mockCloudFormationClient.on(DescribeStackResourceDriftsCommand).resolvesOnce({});
+
+    // WHEN
+    const cx = await builderFixture(toolkit, 'stack-with-bucket');
+    const result = await toolkit.drift(cx);
+
+    // THEN
+    expect(Object.keys(result).length).toBe(0);
+    ioHost.expectMessage({ containing: 'No drift results available' });
+  });
 });