aws-cdk

# AWS CDK TypeScript ## Overview Use this skill to build AWS infrastructure in TypeScript with reusable constructs, safe defaults, and a validation-first delivery loop. ## When to Use Use this skill when: - Creating or refactoring a CDK app, stack, or reusable construct in TypeScript - Choosing between L1, L2, and L3 constructs - Building serverless, networking, or security-focused AWS infrastructure - Wiring multi-stack applications and environment-aware deployments - Validating infrastructure changes with `cdk synth`, tests, `cdk diff`, and `cdk deploy` ## Instructions ### 1. Project Initialization ```bash # Create a new CDK app npx cdk init app --language typescript # Project structure my-cdk-app/ ├── bin/ │ └── my-cdk-app.ts # App entry point (instantiates stacks) ├── lib/ │ └── my-cdk-app-stack.ts # Stack definition ├── test/ │ └── my-cdk-app.test.ts # Tests ├── cdk.json # CDK configuration ├── tsconfig.json └── package.json ``` ### 2. Core Architecture ```typescript import { App, Stack, StackProps, CfnOutput, RemovalPolicy } from 'aws-cdk-lib'; import { Construct } from 'constructs'; import * as s3 from 'aws-cdk-lib/aws-s3'; // Define a reusable stack class StorageStack extends Stack { public readonly bucketArn: string; constructor(scope: Construct, id: string, props?: StackProps) { super(scope, id, props); const bucket = new s3.Bucket(this, 'DataBucket', { versioned: true, encryption: s3.Buc...