Stack Outputs

CDK's CfnOutput constructs are resolved and stored in the state file:

// In your CDK code
new cdk.CfnOutput(this, 'BucketArn', {
  value: bucket.bucketArn,  // Uses Fn::GetAtt internally
  description: 'ARN of the bucket',
});

After deployment, outputs are resolved and printed at the end of cdkd deploy (matching CDK CLI's format) and saved to the S3 state file:

Deployment Summary:
  Stack: MyStack
  ...
  Duration: 21.25s

Outputs:
  MyStack.BucketArn = arn:aws:s3:::actual-bucket-name-xyz

✓ Deployment completed successfully

{
  "outputs": {
    "BucketArn": "arn:aws:s3:::actual-bucket-name-xyz"
  }
}

Key differences from CloudFormation:

• CloudFormation: Outputs accessible via aws cloudformation describe-stacks
• cdkd: Outputs saved in S3 state file (e.g., s3://bucket/cdkd/MyStack/us-east-1/state.json)
• Both print outputs to stdout after a successful deploy
• Both resolve intrinsic functions (Ref, Fn::GetAtt, etc.) to actual values