diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ccd508dab5efd..32c99305535d6 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -156,6 +156,22 @@ Here are a few useful commands:
    evaluate only the rule specified [awslint README](./tools/awslint/README.md)
    for details on include/exclude rule patterns.
 
+### cfn2ts
+
+This tool is used to generate our low-level CloudFormation resources
+(L1/`CfnFoo`). It is executed as part of the build step of all modules in the
+AWS Construct Library.
+
+The tool consults the `cdk-build.cloudformation` key in `package.json` to
+determine which CloudFormation namespace this library represents (e.g.
+`AWS::EC2` is the namespace for `aws-ec2`). We maintain strict 1:1 relationship
+between those.
+
+Each module also has an npm script called `cfn2ts`:
+
+* `npm run cfn2ts`: generates L1 for a specific module
+* `lerna run cfn2ts`: generates L1 for the entire repo
+
 ## Development Workflows
 
 ### Full clean build
diff --git a/packages/@aws-cdk/alexa-ask/package.json b/packages/@aws-cdk/alexa-ask/package.json
index 1b7912a0799e0..8e21ad042116c 100644
--- a/packages/@aws-cdk/alexa-ask/package.json
+++ b/packages/@aws-cdk/alexa-ask/package.json
@@ -36,7 +36,8 @@
     "pkglint": "pkglint -f",
     "test": "cdk-test",
     "watch": "cdk-watch",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "Alexa::ASK"
diff --git a/packages/@aws-cdk/aws-amazonmq/package.json b/packages/@aws-cdk/aws-amazonmq/package.json
index aab237179c15b..c20cd401983b4 100644
--- a/packages/@aws-cdk/aws-amazonmq/package.json
+++ b/packages/@aws-cdk/aws-amazonmq/package.json
@@ -36,7 +36,8 @@
     "pkglint": "pkglint -f",
     "test": "cdk-test",
     "watch": "cdk-watch",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::AmazonMQ"
diff --git a/packages/@aws-cdk/aws-apigateway/package.json b/packages/@aws-cdk/aws-apigateway/package.json
index e3492e31d6eb4..39fae0265b375 100644
--- a/packages/@aws-cdk/aws-apigateway/package.json
+++ b/packages/@aws-cdk/aws-apigateway/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::ApiGateway"
diff --git a/packages/@aws-cdk/aws-applicationautoscaling/package.json b/packages/@aws-cdk/aws-applicationautoscaling/package.json
index 610eeef609f98..f690a2245335c 100644
--- a/packages/@aws-cdk/aws-applicationautoscaling/package.json
+++ b/packages/@aws-cdk/aws-applicationautoscaling/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::ApplicationAutoScaling"
diff --git a/packages/@aws-cdk/aws-appstream/package.json b/packages/@aws-cdk/aws-appstream/package.json
index 284f90a5c0b93..f71a67696af46 100644
--- a/packages/@aws-cdk/aws-appstream/package.json
+++ b/packages/@aws-cdk/aws-appstream/package.json
@@ -36,7 +36,8 @@
     "pkglint": "pkglint -f",
     "test": "cdk-test",
     "watch": "cdk-watch",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::AppStream"
diff --git a/packages/@aws-cdk/aws-appsync/package.json b/packages/@aws-cdk/aws-appsync/package.json
index 8616917b69ee2..ab26e698c3ac2 100644
--- a/packages/@aws-cdk/aws-appsync/package.json
+++ b/packages/@aws-cdk/aws-appsync/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::AppSync"
diff --git a/packages/@aws-cdk/aws-athena/package.json b/packages/@aws-cdk/aws-athena/package.json
index a098df2cd14b5..058af8e62615d 100644
--- a/packages/@aws-cdk/aws-athena/package.json
+++ b/packages/@aws-cdk/aws-athena/package.json
@@ -38,7 +38,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "keywords": [
     "aws",
diff --git a/packages/@aws-cdk/aws-autoscaling/package.json b/packages/@aws-cdk/aws-autoscaling/package.json
index 15d817bf5d798..150c55ca71b21 100644
--- a/packages/@aws-cdk/aws-autoscaling/package.json
+++ b/packages/@aws-cdk/aws-autoscaling/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::AutoScaling"
diff --git a/packages/@aws-cdk/aws-autoscalingplans/package.json b/packages/@aws-cdk/aws-autoscalingplans/package.json
index ee7cc4713ee65..82157d269f814 100644
--- a/packages/@aws-cdk/aws-autoscalingplans/package.json
+++ b/packages/@aws-cdk/aws-autoscalingplans/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::AutoScalingPlans"
diff --git a/packages/@aws-cdk/aws-batch/package.json b/packages/@aws-cdk/aws-batch/package.json
index fce8f30ba8c47..5be1d6f708639 100644
--- a/packages/@aws-cdk/aws-batch/package.json
+++ b/packages/@aws-cdk/aws-batch/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Batch"
diff --git a/packages/@aws-cdk/aws-budgets/package.json b/packages/@aws-cdk/aws-budgets/package.json
index 5d959d0188452..60b311c296f95 100644
--- a/packages/@aws-cdk/aws-budgets/package.json
+++ b/packages/@aws-cdk/aws-budgets/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Budgets"
diff --git a/packages/@aws-cdk/aws-certificatemanager/package.json b/packages/@aws-cdk/aws-certificatemanager/package.json
index 6b1e6d57d051e..fb1510f5e0faf 100644
--- a/packages/@aws-cdk/aws-certificatemanager/package.json
+++ b/packages/@aws-cdk/aws-certificatemanager/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::CertificateManager"
diff --git a/packages/@aws-cdk/aws-cloud9/package.json b/packages/@aws-cdk/aws-cloud9/package.json
index d995030c736b0..d8a06127d18b5 100644
--- a/packages/@aws-cdk/aws-cloud9/package.json
+++ b/packages/@aws-cdk/aws-cloud9/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Cloud9"
diff --git a/packages/@aws-cdk/aws-cloudformation/package.json b/packages/@aws-cdk/aws-cloudformation/package.json
index 0c584f7137903..f46629dded605 100644
--- a/packages/@aws-cdk/aws-cloudformation/package.json
+++ b/packages/@aws-cdk/aws-cloudformation/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::CloudFormation"
diff --git a/packages/@aws-cdk/aws-cloudfront/package.json b/packages/@aws-cdk/aws-cloudfront/package.json
index 26c0fdc8fcf48..26daa24473798 100644
--- a/packages/@aws-cdk/aws-cloudfront/package.json
+++ b/packages/@aws-cdk/aws-cloudfront/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::CloudFront"
diff --git a/packages/@aws-cdk/aws-cloudtrail/package.json b/packages/@aws-cdk/aws-cloudtrail/package.json
index b8e075bbab1cb..ccd9d9a82a571 100644
--- a/packages/@aws-cdk/aws-cloudtrail/package.json
+++ b/packages/@aws-cdk/aws-cloudtrail/package.json
@@ -34,7 +34,8 @@
     "test": "cdk-test",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::CloudTrail"
diff --git a/packages/@aws-cdk/aws-cloudwatch/package.json b/packages/@aws-cdk/aws-cloudwatch/package.json
index c4ef501d64a47..ca25ce23a2617 100644
--- a/packages/@aws-cdk/aws-cloudwatch/package.json
+++ b/packages/@aws-cdk/aws-cloudwatch/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::CloudWatch"
diff --git a/packages/@aws-cdk/aws-codebuild/package.json b/packages/@aws-cdk/aws-codebuild/package.json
index 356862d08abea..f213ffbcaba4e 100644
--- a/packages/@aws-cdk/aws-codebuild/package.json
+++ b/packages/@aws-cdk/aws-codebuild/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::CodeBuild"
diff --git a/packages/@aws-cdk/aws-codecommit/package.json b/packages/@aws-cdk/aws-codecommit/package.json
index 98d1de35f1f78..883b713a992d1 100644
--- a/packages/@aws-cdk/aws-codecommit/package.json
+++ b/packages/@aws-cdk/aws-codecommit/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::CodeCommit"
diff --git a/packages/@aws-cdk/aws-codedeploy/package.json b/packages/@aws-cdk/aws-codedeploy/package.json
index f28057db5731b..a1e13dfe32870 100644
--- a/packages/@aws-cdk/aws-codedeploy/package.json
+++ b/packages/@aws-cdk/aws-codedeploy/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::CodeDeploy"
diff --git a/packages/@aws-cdk/aws-codepipeline/package.json b/packages/@aws-cdk/aws-codepipeline/package.json
index f0249b590a9a0..da21b7b2a47f9 100644
--- a/packages/@aws-cdk/aws-codepipeline/package.json
+++ b/packages/@aws-cdk/aws-codepipeline/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::CodePipeline"
diff --git a/packages/@aws-cdk/aws-cognito/package.json b/packages/@aws-cdk/aws-cognito/package.json
index e285692352c86..979c38fc27ce9 100644
--- a/packages/@aws-cdk/aws-cognito/package.json
+++ b/packages/@aws-cdk/aws-cognito/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Cognito"
diff --git a/packages/@aws-cdk/aws-config/package.json b/packages/@aws-cdk/aws-config/package.json
index 69fee10b973ab..1775ca854460e 100644
--- a/packages/@aws-cdk/aws-config/package.json
+++ b/packages/@aws-cdk/aws-config/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Config"
diff --git a/packages/@aws-cdk/aws-datapipeline/package.json b/packages/@aws-cdk/aws-datapipeline/package.json
index 90f0516eb8394..deb4f55c98157 100644
--- a/packages/@aws-cdk/aws-datapipeline/package.json
+++ b/packages/@aws-cdk/aws-datapipeline/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::DataPipeline"
diff --git a/packages/@aws-cdk/aws-dax/package.json b/packages/@aws-cdk/aws-dax/package.json
index f01c994a94040..d690a5c9559ed 100644
--- a/packages/@aws-cdk/aws-dax/package.json
+++ b/packages/@aws-cdk/aws-dax/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::DAX"
diff --git a/packages/@aws-cdk/aws-directoryservice/package.json b/packages/@aws-cdk/aws-directoryservice/package.json
index 6937576ef8aba..1d981f8fc580c 100644
--- a/packages/@aws-cdk/aws-directoryservice/package.json
+++ b/packages/@aws-cdk/aws-directoryservice/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::DirectoryService"
diff --git a/packages/@aws-cdk/aws-dlm/package.json b/packages/@aws-cdk/aws-dlm/package.json
index d453dc09e29d9..2877c717d2042 100644
--- a/packages/@aws-cdk/aws-dlm/package.json
+++ b/packages/@aws-cdk/aws-dlm/package.json
@@ -36,7 +36,8 @@
     "pkglint": "pkglint -f",
     "test": "cdk-test",
     "watch": "cdk-watch",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::DLM"
diff --git a/packages/@aws-cdk/aws-dms/package.json b/packages/@aws-cdk/aws-dms/package.json
index cb87037905226..d8ce0f19bb1c2 100644
--- a/packages/@aws-cdk/aws-dms/package.json
+++ b/packages/@aws-cdk/aws-dms/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::DMS"
diff --git a/packages/@aws-cdk/aws-dynamodb/package.json b/packages/@aws-cdk/aws-dynamodb/package.json
index 1398aeabfb9b1..67841c31b993b 100644
--- a/packages/@aws-cdk/aws-dynamodb/package.json
+++ b/packages/@aws-cdk/aws-dynamodb/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::DynamoDB"
diff --git a/packages/@aws-cdk/aws-ec2/package.json b/packages/@aws-cdk/aws-ec2/package.json
index ab5f3163e6a30..8eaa365420d01 100644
--- a/packages/@aws-cdk/aws-ec2/package.json
+++ b/packages/@aws-cdk/aws-ec2/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::EC2"
diff --git a/packages/@aws-cdk/aws-ecr/package.json b/packages/@aws-cdk/aws-ecr/package.json
index 66ecea755a6e6..159abfd955aa1 100644
--- a/packages/@aws-cdk/aws-ecr/package.json
+++ b/packages/@aws-cdk/aws-ecr/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::ECR"
diff --git a/packages/@aws-cdk/aws-ecs/package.json b/packages/@aws-cdk/aws-ecs/package.json
index cb5e391e19407..60bce0cc371e9 100644
--- a/packages/@aws-cdk/aws-ecs/package.json
+++ b/packages/@aws-cdk/aws-ecs/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::ECS"
diff --git a/packages/@aws-cdk/aws-efs/package.json b/packages/@aws-cdk/aws-efs/package.json
index 0e1e0503cfbc1..9d12ec8076954 100644
--- a/packages/@aws-cdk/aws-efs/package.json
+++ b/packages/@aws-cdk/aws-efs/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::EFS"
diff --git a/packages/@aws-cdk/aws-eks/package.json b/packages/@aws-cdk/aws-eks/package.json
index 60b99e7ba34a5..aab9e7338c98a 100644
--- a/packages/@aws-cdk/aws-eks/package.json
+++ b/packages/@aws-cdk/aws-eks/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::EKS"
diff --git a/packages/@aws-cdk/aws-elasticache/package.json b/packages/@aws-cdk/aws-elasticache/package.json
index db71b6ceea00e..023a59d44c40b 100644
--- a/packages/@aws-cdk/aws-elasticache/package.json
+++ b/packages/@aws-cdk/aws-elasticache/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::ElastiCache"
diff --git a/packages/@aws-cdk/aws-elasticbeanstalk/package.json b/packages/@aws-cdk/aws-elasticbeanstalk/package.json
index 8485af3458425..0f0e2b2b9a9a8 100644
--- a/packages/@aws-cdk/aws-elasticbeanstalk/package.json
+++ b/packages/@aws-cdk/aws-elasticbeanstalk/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::ElasticBeanstalk"
diff --git a/packages/@aws-cdk/aws-elasticloadbalancing/package.json b/packages/@aws-cdk/aws-elasticloadbalancing/package.json
index 3db81523cd10c..4a2165b4711c8 100644
--- a/packages/@aws-cdk/aws-elasticloadbalancing/package.json
+++ b/packages/@aws-cdk/aws-elasticloadbalancing/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::ElasticLoadBalancing"
diff --git a/packages/@aws-cdk/aws-elasticloadbalancingv2/lib/shared/base-target-group.ts b/packages/@aws-cdk/aws-elasticloadbalancingv2/lib/shared/base-target-group.ts
index 32cd72a8ad4a3..2b71ef19d39d1 100644
--- a/packages/@aws-cdk/aws-elasticloadbalancingv2/lib/shared/base-target-group.ts
+++ b/packages/@aws-cdk/aws-elasticloadbalancingv2/lib/shared/base-target-group.ts
@@ -234,7 +234,7 @@ export abstract class TargetGroupBase extends cdk.Construct implements ITargetGr
       ...additionalProps
     });
 
-    this.targetGroupLoadBalancerArns = this.resource.targetGroupLoadBalancerArns.toList();
+    this.targetGroupLoadBalancerArns = this.resource.targetGroupLoadBalancerArns;
     this.targetGroupArn = this.resource.ref;
     this.targetGroupFullName = this.resource.targetGroupFullName;
     this.loadBalancerArns = this.resource.targetGroupLoadBalancerArns.toString();
diff --git a/packages/@aws-cdk/aws-elasticloadbalancingv2/package.json b/packages/@aws-cdk/aws-elasticloadbalancingv2/package.json
index f0c32b4097d58..4f6a863de2591 100644
--- a/packages/@aws-cdk/aws-elasticloadbalancingv2/package.json
+++ b/packages/@aws-cdk/aws-elasticloadbalancingv2/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::ElasticLoadBalancingV2"
diff --git a/packages/@aws-cdk/aws-elasticsearch/package.json b/packages/@aws-cdk/aws-elasticsearch/package.json
index 17362517d46b4..295ad5307bf55 100644
--- a/packages/@aws-cdk/aws-elasticsearch/package.json
+++ b/packages/@aws-cdk/aws-elasticsearch/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Elasticsearch"
diff --git a/packages/@aws-cdk/aws-emr/package.json b/packages/@aws-cdk/aws-emr/package.json
index 26d0f0d760ddc..2d875fb9c94c0 100644
--- a/packages/@aws-cdk/aws-emr/package.json
+++ b/packages/@aws-cdk/aws-emr/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::EMR"
diff --git a/packages/@aws-cdk/aws-events/package.json b/packages/@aws-cdk/aws-events/package.json
index c090901545031..71975a760bf74 100644
--- a/packages/@aws-cdk/aws-events/package.json
+++ b/packages/@aws-cdk/aws-events/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Events"
diff --git a/packages/@aws-cdk/aws-gamelift/package.json b/packages/@aws-cdk/aws-gamelift/package.json
index 63c5e341eb8f8..3a83fe6f5b696 100644
--- a/packages/@aws-cdk/aws-gamelift/package.json
+++ b/packages/@aws-cdk/aws-gamelift/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::GameLift"
diff --git a/packages/@aws-cdk/aws-glue/package.json b/packages/@aws-cdk/aws-glue/package.json
index a7aab0cc26e8a..462f0b2e306b1 100644
--- a/packages/@aws-cdk/aws-glue/package.json
+++ b/packages/@aws-cdk/aws-glue/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Glue"
diff --git a/packages/@aws-cdk/aws-guardduty/package.json b/packages/@aws-cdk/aws-guardduty/package.json
index 86dc0a10afadc..a419b5705abe5 100644
--- a/packages/@aws-cdk/aws-guardduty/package.json
+++ b/packages/@aws-cdk/aws-guardduty/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::GuardDuty"
diff --git a/packages/@aws-cdk/aws-iam/package.json b/packages/@aws-cdk/aws-iam/package.json
index 57e6a9f2d37c1..cdf21c2c535aa 100644
--- a/packages/@aws-cdk/aws-iam/package.json
+++ b/packages/@aws-cdk/aws-iam/package.json
@@ -35,7 +35,8 @@
     "pkglint": "pkglint -f",
     "integ": "cdk-integ",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::IAM"
diff --git a/packages/@aws-cdk/aws-inspector/package.json b/packages/@aws-cdk/aws-inspector/package.json
index 503088c8c3234..7d450e411bf10 100644
--- a/packages/@aws-cdk/aws-inspector/package.json
+++ b/packages/@aws-cdk/aws-inspector/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Inspector"
diff --git a/packages/@aws-cdk/aws-iot/package.json b/packages/@aws-cdk/aws-iot/package.json
index 991d3b4ba04c6..25b37469ae0a6 100644
--- a/packages/@aws-cdk/aws-iot/package.json
+++ b/packages/@aws-cdk/aws-iot/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::IoT"
diff --git a/packages/@aws-cdk/aws-iot1click/package.json b/packages/@aws-cdk/aws-iot1click/package.json
index 6a15d49470199..3f7f740aa8048 100644
--- a/packages/@aws-cdk/aws-iot1click/package.json
+++ b/packages/@aws-cdk/aws-iot1click/package.json
@@ -36,7 +36,8 @@
     "pkglint": "pkglint -f",
     "test": "cdk-test",
     "watch": "cdk-watch",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::IoT1Click"
diff --git a/packages/@aws-cdk/aws-iotanalytics/package.json b/packages/@aws-cdk/aws-iotanalytics/package.json
index 1386cdd8c906d..1aabc33751b1a 100644
--- a/packages/@aws-cdk/aws-iotanalytics/package.json
+++ b/packages/@aws-cdk/aws-iotanalytics/package.json
@@ -36,7 +36,8 @@
     "pkglint": "pkglint -f",
     "test": "cdk-test",
     "watch": "cdk-watch",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::IoTAnalytics"
diff --git a/packages/@aws-cdk/aws-kinesis/package.json b/packages/@aws-cdk/aws-kinesis/package.json
index 1737d2f2a329e..26950e04ef58b 100644
--- a/packages/@aws-cdk/aws-kinesis/package.json
+++ b/packages/@aws-cdk/aws-kinesis/package.json
@@ -34,7 +34,8 @@
     "test": "cdk-test",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Kinesis"
diff --git a/packages/@aws-cdk/aws-kinesisanalytics/package.json b/packages/@aws-cdk/aws-kinesisanalytics/package.json
index b4b6596a43fc7..5e718912ed775 100644
--- a/packages/@aws-cdk/aws-kinesisanalytics/package.json
+++ b/packages/@aws-cdk/aws-kinesisanalytics/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::KinesisAnalytics"
diff --git a/packages/@aws-cdk/aws-kinesisfirehose/package.json b/packages/@aws-cdk/aws-kinesisfirehose/package.json
index 42f9780408cf9..49f9d1bd7a7b4 100644
--- a/packages/@aws-cdk/aws-kinesisfirehose/package.json
+++ b/packages/@aws-cdk/aws-kinesisfirehose/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::KinesisFirehose"
diff --git a/packages/@aws-cdk/aws-kms/package.json b/packages/@aws-cdk/aws-kms/package.json
index 8acfbfc402353..5bb1db708aef6 100644
--- a/packages/@aws-cdk/aws-kms/package.json
+++ b/packages/@aws-cdk/aws-kms/package.json
@@ -35,7 +35,8 @@
     "pkglint": "pkglint -f",
     "integ": "cdk-integ",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::KMS"
diff --git a/packages/@aws-cdk/aws-lambda/package.json b/packages/@aws-cdk/aws-lambda/package.json
index 74b6542f1bd15..9fe6ca8269269 100644
--- a/packages/@aws-cdk/aws-lambda/package.json
+++ b/packages/@aws-cdk/aws-lambda/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Lambda"
diff --git a/packages/@aws-cdk/aws-logs/package.json b/packages/@aws-cdk/aws-logs/package.json
index 12527c729505d..ec39dae695238 100644
--- a/packages/@aws-cdk/aws-logs/package.json
+++ b/packages/@aws-cdk/aws-logs/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Logs"
diff --git a/packages/@aws-cdk/aws-neptune/package.json b/packages/@aws-cdk/aws-neptune/package.json
index e1e13650e9dd6..152ceea611204 100644
--- a/packages/@aws-cdk/aws-neptune/package.json
+++ b/packages/@aws-cdk/aws-neptune/package.json
@@ -36,7 +36,8 @@
     "pkglint": "pkglint -f",
     "test": "cdk-test",
     "watch": "cdk-watch",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Neptune"
diff --git a/packages/@aws-cdk/aws-opsworks/package.json b/packages/@aws-cdk/aws-opsworks/package.json
index 5d363912958ab..44e6d84bd2da2 100644
--- a/packages/@aws-cdk/aws-opsworks/package.json
+++ b/packages/@aws-cdk/aws-opsworks/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::OpsWorks"
diff --git a/packages/@aws-cdk/aws-rds/package.json b/packages/@aws-cdk/aws-rds/package.json
index 049f3c1953472..bea6fa88d8706 100644
--- a/packages/@aws-cdk/aws-rds/package.json
+++ b/packages/@aws-cdk/aws-rds/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::RDS"
diff --git a/packages/@aws-cdk/aws-redshift/package.json b/packages/@aws-cdk/aws-redshift/package.json
index 6920fbd937764..16dba5bb6257d 100644
--- a/packages/@aws-cdk/aws-redshift/package.json
+++ b/packages/@aws-cdk/aws-redshift/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Redshift"
diff --git a/packages/@aws-cdk/aws-route53/lib/hosted-zone.ts b/packages/@aws-cdk/aws-route53/lib/hosted-zone.ts
index a4b7c1e865ef2..37bd097d253e7 100644
--- a/packages/@aws-cdk/aws-route53/lib/hosted-zone.ts
+++ b/packages/@aws-cdk/aws-route53/lib/hosted-zone.ts
@@ -1,7 +1,7 @@
 import ec2 = require('@aws-cdk/aws-ec2');
 import cdk = require('@aws-cdk/cdk');
 import { HostedZoneImportProps, IHostedZone } from './hosted-zone-ref';
-import { CfnHostedZone, HostedZoneNameServers } from './route53.generated';
+import { CfnHostedZone } from './route53.generated';
 import { validateZoneName } from './util';
 
 /**
@@ -61,7 +61,7 @@ export class PublicHostedZone extends HostedZone {
   /**
    * Nameservers for this public hosted zone
    */
-  public readonly nameServers: HostedZoneNameServers;
+  public readonly nameServers: string[];
 
   constructor(scope: cdk.Construct, id: string, props: PublicHostedZoneProps) {
     super(scope, id);
diff --git a/packages/@aws-cdk/aws-route53/package.json b/packages/@aws-cdk/aws-route53/package.json
index 34482a57ed11a..8f0468df801bb 100644
--- a/packages/@aws-cdk/aws-route53/package.json
+++ b/packages/@aws-cdk/aws-route53/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Route53"
diff --git a/packages/@aws-cdk/aws-route53resolver/package.json b/packages/@aws-cdk/aws-route53resolver/package.json
index 5875e15290d93..acf403a3dc11c 100644
--- a/packages/@aws-cdk/aws-route53resolver/package.json
+++ b/packages/@aws-cdk/aws-route53resolver/package.json
@@ -36,7 +36,8 @@
     "pkglint": "pkglint -f",
     "test": "cdk-test",
     "watch": "cdk-watch",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Route53Resolver"
diff --git a/packages/@aws-cdk/aws-s3/package.json b/packages/@aws-cdk/aws-s3/package.json
index 523508b3e7009..3db164dec96f7 100644
--- a/packages/@aws-cdk/aws-s3/package.json
+++ b/packages/@aws-cdk/aws-s3/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::S3"
diff --git a/packages/@aws-cdk/aws-sagemaker/package.json b/packages/@aws-cdk/aws-sagemaker/package.json
index 32e6ad4bb3fbf..d104f19ffa884 100644
--- a/packages/@aws-cdk/aws-sagemaker/package.json
+++ b/packages/@aws-cdk/aws-sagemaker/package.json
@@ -36,7 +36,8 @@
     "pkglint": "pkglint -f",
     "test": "cdk-test",
     "watch": "cdk-watch",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::SageMaker"
diff --git a/packages/@aws-cdk/aws-sdb/package.json b/packages/@aws-cdk/aws-sdb/package.json
index a7d5f9e1567a9..77d0063483f82 100644
--- a/packages/@aws-cdk/aws-sdb/package.json
+++ b/packages/@aws-cdk/aws-sdb/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::SDB"
diff --git a/packages/@aws-cdk/aws-secretsmanager/package.json b/packages/@aws-cdk/aws-secretsmanager/package.json
index f682086ddbe90..1559be54f2c5c 100644
--- a/packages/@aws-cdk/aws-secretsmanager/package.json
+++ b/packages/@aws-cdk/aws-secretsmanager/package.json
@@ -36,7 +36,8 @@
     "pkglint": "pkglint -f",
     "test": "cdk-test",
     "watch": "cdk-watch",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::SecretsManager"
diff --git a/packages/@aws-cdk/aws-serverless/package.json b/packages/@aws-cdk/aws-serverless/package.json
index 018cb4139c9da..068151dae302c 100644
--- a/packages/@aws-cdk/aws-serverless/package.json
+++ b/packages/@aws-cdk/aws-serverless/package.json
@@ -36,7 +36,8 @@
     "pkglint": "pkglint -f",
     "test": "cdk-test",
     "watch": "cdk-watch",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::Serverless"
diff --git a/packages/@aws-cdk/aws-servicecatalog/package.json b/packages/@aws-cdk/aws-servicecatalog/package.json
index f86e47e1d438f..dcd34cceb3775 100644
--- a/packages/@aws-cdk/aws-servicecatalog/package.json
+++ b/packages/@aws-cdk/aws-servicecatalog/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::ServiceCatalog"
diff --git a/packages/@aws-cdk/aws-servicediscovery/package.json b/packages/@aws-cdk/aws-servicediscovery/package.json
index cadbbf6f2d99e..a7f2065b6c4d4 100644
--- a/packages/@aws-cdk/aws-servicediscovery/package.json
+++ b/packages/@aws-cdk/aws-servicediscovery/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::ServiceDiscovery"
diff --git a/packages/@aws-cdk/aws-ses/package.json b/packages/@aws-cdk/aws-ses/package.json
index d01b5b192087a..353632658dcfa 100644
--- a/packages/@aws-cdk/aws-ses/package.json
+++ b/packages/@aws-cdk/aws-ses/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::SES"
diff --git a/packages/@aws-cdk/aws-sns/package.json b/packages/@aws-cdk/aws-sns/package.json
index d557def1ace01..017df9cbd6099 100644
--- a/packages/@aws-cdk/aws-sns/package.json
+++ b/packages/@aws-cdk/aws-sns/package.json
@@ -22,7 +22,9 @@
       },
       "sphinx": {}
     },
-    "excludeTypescript": ["examples"]
+    "excludeTypescript": [
+      "examples"
+    ]
   },
   "repository": {
     "type": "git",
@@ -36,7 +38,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::SNS"
diff --git a/packages/@aws-cdk/aws-sqs/package.json b/packages/@aws-cdk/aws-sqs/package.json
index 4cd5ed45af113..cb164daf33105 100644
--- a/packages/@aws-cdk/aws-sqs/package.json
+++ b/packages/@aws-cdk/aws-sqs/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::SQS"
diff --git a/packages/@aws-cdk/aws-ssm/package.json b/packages/@aws-cdk/aws-ssm/package.json
index bba7ae006a162..ac3683dc56aaf 100644
--- a/packages/@aws-cdk/aws-ssm/package.json
+++ b/packages/@aws-cdk/aws-ssm/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::SSM"
diff --git a/packages/@aws-cdk/aws-stepfunctions/package.json b/packages/@aws-cdk/aws-stepfunctions/package.json
index 1c15ec1089cdc..43b09c9950160 100644
--- a/packages/@aws-cdk/aws-stepfunctions/package.json
+++ b/packages/@aws-cdk/aws-stepfunctions/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::StepFunctions"
diff --git a/packages/@aws-cdk/aws-waf/package.json b/packages/@aws-cdk/aws-waf/package.json
index 40efdd860d07e..dbce884c0e1cd 100644
--- a/packages/@aws-cdk/aws-waf/package.json
+++ b/packages/@aws-cdk/aws-waf/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::WAF"
diff --git a/packages/@aws-cdk/aws-wafregional/package.json b/packages/@aws-cdk/aws-wafregional/package.json
index 7b0e85664a697..84fafc0824c26 100644
--- a/packages/@aws-cdk/aws-wafregional/package.json
+++ b/packages/@aws-cdk/aws-wafregional/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::WAFRegional"
diff --git a/packages/@aws-cdk/aws-workspaces/package.json b/packages/@aws-cdk/aws-workspaces/package.json
index a0c9b3abbe82a..789220ab51f19 100644
--- a/packages/@aws-cdk/aws-workspaces/package.json
+++ b/packages/@aws-cdk/aws-workspaces/package.json
@@ -35,7 +35,8 @@
     "integ": "cdk-integ",
     "pkglint": "pkglint -f",
     "package": "cdk-package",
-    "awslint": "cdk-awslint"
+    "awslint": "cdk-awslint",
+    "cfn2ts": "cfn2ts"
   },
   "cdk-build": {
     "cloudformation": "AWS::WorkSpaces"
diff --git a/packages/@aws-cdk/cfnspec/build-tools/create-missing-libraries.ts b/packages/@aws-cdk/cfnspec/build-tools/create-missing-libraries.ts
index 5d33a4a404369..b71a21fe00ae6 100644
--- a/packages/@aws-cdk/cfnspec/build-tools/create-missing-libraries.ts
+++ b/packages/@aws-cdk/cfnspec/build-tools/create-missing-libraries.ts
@@ -107,7 +107,8 @@ async function main() {
         package: "cdk-package",
         pkglint: "pkglint -f",
         test: "cdk-test",
-        watch: "cdk-watch"
+        watch: "cdk-watch",
+        cfn2ts: "cfn2ts"
       },
       'cdk-build': {
         cloudformation: namespace
diff --git a/tools/cfn2ts/bin/cfn2ts.ts b/tools/cfn2ts/bin/cfn2ts.ts
index 36502e2a72549..c38e67b3aa75d 100755
--- a/tools/cfn2ts/bin/cfn2ts.ts
+++ b/tools/cfn2ts/bin/cfn2ts.ts
@@ -1,20 +1,43 @@
 #!/usr/bin/env node
-import 'source-map-support/register';
-
+import fs = require('fs-extra');
 import yargs = require('yargs');
 import generate from '../lib';
 
-// tslint:disable-next-line:no-unused-expression
-const argv =
-  yargs.usage('Usage: cfn2ts')
-    .option('scope', { type: 'string', desc: 'Scope to generate TypeScript for (e.g: AWS::IAM)', required: true })
+// tslint:disable:no-console
+// tslint:disable:max-line-length
+
+async function main() {
+  const argv = yargs.usage('Usage: cfn2ts')
+    .option('scope', { type: 'string', desc: 'Scope to generate TypeScript for (e.g: AWS::IAM)' })
     .option('out', { type: 'string', desc: 'Path to the directory where the TypeScript files should be written', default: 'lib' })
-    .option('force', { type: 'boolean', desc: 'Generate the spec even if it appears up-to-date', default: false })
+    .epilog('if --scope is not defined, cfn2ts will try to obtain the scope from the local package.json under the "cdk-build.cloudformation" key.')
     .argv;
 
-generate(argv.scope, argv.out, argv.force).catch(err => {
-  // tslint:disable:no-console
+  if (!argv.scope) {
+    argv.scope = await tryAutoDetectScope();
+  }
+
+  if (!argv.scope) {
+    throw new Error(`--scope is not provided and cannot be auto-detected from package.json (under "cdk-build.cloudformation")`);
+  }
+
+  await generate(argv.scope, argv.out);
+}
+
+main().catch(err => {
   console.error(err);
-  // tslint:enable:no-console
   process.exit(1);
 });
+
+async function tryAutoDetectScope() {
+  if (!await fs.pathExists('./package.json')) {
+    return undefined;
+  }
+
+  const pkg = await fs.readJSON('./package.json');
+  if (!pkg['cdk-build']) {
+    return undefined;
+  }
+
+  return pkg['cdk-build'].cloudformation;
+}
diff --git a/tools/cfn2ts/lib/codegen.ts b/tools/cfn2ts/lib/codegen.ts
index 63a65507d666c..56965ee5b2b43 100644
--- a/tools/cfn2ts/lib/codegen.ts
+++ b/tools/cfn2ts/lib/codegen.ts
@@ -74,7 +74,7 @@ export default class CodeGenerator {
       const legacyResourceName = genspec.CodeName.forLegacyResource(cfnName);
       this.code.line();
 
-      const attributeTypes = this.emitResourceType(resourceName, resourceType);
+      this.emitResourceType(resourceName, resourceType);
       this.emitPropertyTypes(name, resourceName);
 
       // emit the "cloudformation.XxxResource" classes for backwards compatibility
@@ -84,10 +84,6 @@ export default class CodeGenerator {
       this.emitResourceType(legacyResourceName, resourceType, resourceName);
       this.emitPropertyTypes(name, legacyResourceName);
       this.code.closeBlock();
-
-      for (const attributeType of attributeTypes) {
-        this.emitAttributeType(attributeType);
-      }
     }
   }
 
@@ -215,7 +211,6 @@ export default class CodeGenerator {
     // Attributes
     //
 
-    const attributeTypes = new Array<genspec.AttributeTypeDeclaration>();
     const attributes = new Array<genspec.Attribute>();
 
     if (spec.Attributes) {
@@ -227,10 +222,9 @@ export default class CodeGenerator {
         this.docLink(undefined, `@cloudformation_attribute ${attributeName}`);
         const attr = genspec.attributeDefinition(resourceName, attributeName, attributeSpec);
 
-        this.code.line(`public readonly ${attr.propertyName}: ${attr.attributeType.typeName.className};`);
+        this.code.line(`public readonly ${attr.propertyName}: ${attr.attributeType};`);
 
         attributes.push(attr);
-        attributeTypes.push(attr.attributeType);
       }
     }
 
@@ -242,9 +236,8 @@ export default class CodeGenerator {
 
       // If there's already an attribute with the same name, ref is not needed
       if (!attributes.some(a => a.propertyName === refAttribute.propertyName)) {
-        this.code.line(`public readonly ${refAttribute.propertyName}: ${refAttribute.attributeType.typeName.className};`);
+        this.code.line(`public readonly ${refAttribute.propertyName}: ${refAttribute.attributeType};`);
         attributes.push(refAttribute);
-        attributeTypes.push(refAttribute.attributeType);
       }
     }
 
@@ -286,14 +279,12 @@ export default class CodeGenerator {
 
     // initialize all attribute properties
     for (const at of attributes) {
-      if (at.attributeType.isPrimitive) {
-        if (at.attributeType.typeName.className === 'string') {
-          this.code.line(`this.${at.propertyName} = ${at.constructorArguments}.toString();`);
-        } else {
-          throw new Error(`Unsupported primitive attribute type ${at.attributeType.typeName.className}`);
-        }
-      } else {
-        this.code.line(`this.${at.propertyName} = new ${at.attributeType.typeName.className}(${at.constructorArguments});`);
+      if (at.attributeType === 'string') {
+        this.code.line(`this.${at.propertyName} = ${at.constructorArguments}.toString();`);
+      } else if (at.attributeType === 'string[]') {
+        this.code.line(`this.${at.propertyName} = ${at.constructorArguments}.toList();`);
+      } else if (at.attributeType === genspec.TOKEN_NAME.fqn) {
+        this.code.line(`this.${at.propertyName} = ${at.constructorArguments};`);
       }
     }
 
@@ -315,8 +306,6 @@ export default class CodeGenerator {
     this.closeClass(resourceName);
 
     this.endNamespace(resourceName);
-
-    return attributeTypes;
   }
 
   /**
@@ -486,26 +475,6 @@ export default class CodeGenerator {
     this.code.closeBlock();
   }
 
-  /**
-   * Attribute types are classes that represent resource attributes (e.g. QueueArnAttribute).
-   */
-  private emitAttributeType(attr: genspec.AttributeTypeDeclaration) {
-    if (!attr.baseClassName) {
-      return; // primitive, no attribute type generated
-    }
-
-    this.code.line();
-    this.openClass(attr.typeName, attr.docLink, attr.baseClassName.fqn);
-    // Add a private member that will make the class structurally
-    // different in TypeScript, which prevents assigning returning
-    // incorrectly-typed Tokens. Those will cause ClassCastExceptions
-    // in strictly-typed languages.
-    this.code.line('// @ts-ignore: private but unused on purpose.');
-    this.code.line(`private readonly thisIsA${attr.typeName.className} = true;`);
-
-    this.closeClass(attr.typeName);
-  }
-
   private emitProperty(context: genspec.CodeName, propName: string, spec: schema.Property, additionalDocs: string): string {
     const question = spec.Required ? '' : '?';
     const javascriptPropertyName = genspec.cloudFormationToScriptName(propName);
diff --git a/tools/cfn2ts/lib/genspec.ts b/tools/cfn2ts/lib/genspec.ts
index e63444f3b7db3..5ea5fed035ba3 100644
--- a/tools/cfn2ts/lib/genspec.ts
+++ b/tools/cfn2ts/lib/genspec.ts
@@ -102,22 +102,6 @@ export class CodeName {
   }
 }
 
-/**
- * Class declaration
- */
-export class AttributeTypeDeclaration {
-  constructor(
-      readonly typeName: CodeName,
-      readonly baseClassName?: CodeName,
-      readonly docLink?: string
-    ) {
-  }
-
-  public get isPrimitive() {
-    return !this.baseClassName;
-  }
-}
-
 export const TAG_NAME = new CodeName('', CORE_NAMESPACE, 'Tag');
 export const TOKEN_NAME = new CodeName('', CORE_NAMESPACE, 'Token');
 
@@ -127,7 +111,7 @@ export const TOKEN_NAME = new CodeName('', CORE_NAMESPACE, 'Token');
 export class Attribute {
   constructor(
     readonly propertyName: string,
-    readonly attributeType: AttributeTypeDeclaration,
+    readonly attributeType: string,
     readonly constructorArguments: string) {
   }
 }
@@ -192,13 +176,15 @@ export function attributeDefinition(resourceName: CodeName, attributeName: strin
   const descriptiveName = descriptiveAttributeName(resourceName, attributeName);  // "BucketArn"
   const propertyName = cloudFormationToScriptName(descriptiveName);      // "bucketArn"
 
-  let attrType;
+  let attrType: string;
   if ('PrimitiveType' in spec && spec.PrimitiveType === 'String') {
-    attrType = new AttributeTypeDeclaration(CodeName.forPrimitive('string'));
+    attrType = 'string';
+  } else if ('Type' in spec && 'PrimitiveItemType' in spec && spec.Type === 'List' && spec.PrimitiveItemType === 'String') {
+    attrType = 'string[]';
   } else {
-    // Not in a namespace, base the name on the descriptive name
-    const typeName = new CodeName(resourceName.packageName, '', descriptiveName); // "BucketArn"
-    attrType = new AttributeTypeDeclaration(typeName, TOKEN_NAME, undefined);
+    // tslint:disable-next-line:no-console
+    console.error(`WARNING: Unable to represent attribute type ${JSON.stringify(spec)} as a native type`);
+    attrType = TOKEN_NAME.fqn;
   }
 
   const constructorArguments = `this.getAtt('${attributeName}')`;
@@ -213,8 +199,7 @@ export function refAttributeDefinition(resourceName: CodeName, refKind: string):
 
   const constructorArguments = 'this.ref';
 
-  const refType = new AttributeTypeDeclaration(CodeName.forPrimitive('string'));
-  return new Attribute(propertyName, refType, constructorArguments);
+  return new Attribute(propertyName, 'string', constructorArguments);
 }
 
 /**
diff --git a/tools/cfn2ts/lib/index.ts b/tools/cfn2ts/lib/index.ts
index d06c845b6ec6f..3d38b29efc662 100644
--- a/tools/cfn2ts/lib/index.ts
+++ b/tools/cfn2ts/lib/index.ts
@@ -1,11 +1,9 @@
 import cfnSpec = require('@aws-cdk/cfnspec');
-import colors = require('colors/safe');
 import fs = require('fs-extra');
-import path = require('path');
 import CodeGenerator from './codegen';
 import { packageName } from './genspec';
 
-export default async function(scope: string, outPath: string, force: boolean) {
+export default async function(scope: string, outPath: string) {
   if (outPath !== '.') { await fs.mkdirp(outPath); }
 
   const spec = cfnSpec.filteredSpecification(s => s.startsWith(`${scope}::`));
@@ -15,15 +13,7 @@ export default async function(scope: string, outPath: string, force: boolean) {
   const name = packageName(scope);
 
   const generator = new CodeGenerator(name, spec);
-
-  if (!force && await generator.upToDate(outPath)) {
-    // tslint:disable-next-line:no-console
-    console.log('Generated code already up-to-date: %s', colors.green(path.join(outPath, generator.outputFile)));
-    return;
-  }
   generator.emitCode();
 
-  // tslint:disable-next-line:no-console
-  console.log('Generated code: %s', colors.green(path.join(outPath, generator.outputFile)));
   await generator.save(outPath);
 }
diff --git a/tools/cfn2ts/package.json b/tools/cfn2ts/package.json
index 57958466d3a7a..a2d02d096b2b3 100644
--- a/tools/cfn2ts/package.json
+++ b/tools/cfn2ts/package.json
@@ -32,10 +32,8 @@
   "dependencies": {
     "@aws-cdk/cfnspec": "^0.21.0",
     "codemaker": "^0.6.4",
-    "colors": "^1.2.1",
     "fast-json-patch": "^2.0.6",
     "fs-extra": "^7.0.0",
-    "source-map-support": "^0.5.6",
     "yargs": "^9.0.1"
   },
   "devDependencies": {
diff --git a/tools/pkglint/lib/rules.ts b/tools/pkglint/lib/rules.ts
index 4e6a6649fe5de..c0cc3775933e9 100644
--- a/tools/pkglint/lib/rules.ts
+++ b/tools/pkglint/lib/rules.ts
@@ -680,10 +680,30 @@ export class AwsLint extends ValidationRule {
       return;
     }
 
+    if (!isAWS(pkg)) {
+      return;
+    }
+
     expectJSON(this.name, pkg, 'scripts.awslint', 'cdk-awslint');
   }
 }
 
+export class Cfn2Ts extends ValidationRule {
+  public name = 'cfn2ts';
+
+  public validate(pkg: PackageJson) {
+    if (!isJSII(pkg)) {
+      return;
+    }
+
+    if (!isAWS(pkg)) {
+      return;
+    }
+
+    expectJSON(this.name, pkg, 'scripts.cfn2ts', 'cfn2ts');
+  }
+}
+
 /**
  * Determine whether this is a JSII package
  *
@@ -693,6 +713,14 @@ function isJSII(pkg: PackageJson): boolean {
   return pkg.json.jsii;
 }
 
+/**
+ * Indicates that this is an "AWS" package (i.e. that it it has a cloudformation source)
+ * @param pkg
+ */
+function isAWS(pkg: PackageJson): boolean {
+  return pkg.json['cdk-build'] && pkg.json['cdk-build'].cloudformation;
+}
+
 /**
  * Determine whether the package has tests
  *