aws-cdk

Authors, deploys, and troubleshoots AWS infrastructure using CDK with TypeScript or Python. Covers best practices, stack architecture, and construct patterns. Always use when writing CDK constructs, bootstrapping environments, running cdk deploy/synth/diff, fixing CDK or CloudFormation errors, planning stack structure, importing existing resources, resolving drift, or refactoring stacks without resource replacement.

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Repository: aws-samples/sample-ramp-aidlc-mod-starter-packs
Last source activity: July 14, 2026 at 08:01
Detected SKILL.md language: English
Stars: 5
Forks: 2

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name	aws-cdk
description	Authors, deploys, and troubleshoots AWS infrastructure using CDK with TypeScript or Python. Covers best practices, stack architecture, and construct patterns. Always use when writing CDK constructs, bootstrapping environments, running cdk deploy/synth/diff, fixing CDK or CloudFormation errors, planning stack structure, importing existing resources, resolving drift, or refactoring stacks without resource replacement.
version	1

AWS CDK

Overview

Domain expertise for CDK construct authoring, deployment workflows, compliance, drift, importing resources, safe refactoring, and troubleshooting CDK CLI / CloudFormation errors.

When NOT to use: Raw CloudFormation YAML/JSON. SAM. Terraform/Pulumi. CI/CD beyond CDK Pipelines. Use builtin knowledge or specialized skills for these.

Critical Warnings

Deadly embrace: Removing a cross-stack reference deadlocks deployment (Export ... cannot be deleted as it is in use by ...). Preferred fix: weaken the reference first — CrossStackReferences.of($RESOURCE).produce(ReferenceStrength.BOTH) then WEAK, then remove (three deploys). Legacy fallback: two-deploy this.exportValue() recipe. See troubleshooting-deployment.

Construct ID changes cause replacement: Renaming/moving a construct changes its logical ID → CloudFormation replaces the resource (data loss for stateful resources). Always cdk diff before deploy. See refactor-and-prevent-replacement.

Task	Quick Command	Details
Bootstrap	`cdk bootstrap aws://$ACCOUNT/$REGION`	bootstrap-and-project-setup
New TS project	`cdk init app --language typescript` — use `tsx`, `eslint-plugin-awscdk`	bootstrap-and-project-setup
New Python project	`cdk init app --language python` — pin deps, use virtualenv	bootstrap-and-project-setup
Deploy	`cdk synth --strict` → `cdk diff` → `cdk deploy`	Always diff before deploy to prod
cdk-nag	`Aspects.of(app).add(new AwsSolutionsChecks())`	compliance-and-drift
Drift	`cdk drift $STACK` (use `--fail` in CI)	compliance-and-drift
Import resource	`cdk import` (interactive or `--resource-mapping` for CI), `cdk deploy --import-existing-resources`	import-and-migrate
Refactor safely	`cdk refactor --unstable=refactor` — no property changes in same deploy	refactor-and-prevent-replacement

Error	Cause → Fix
DeployFailed / DeploymentError	CDK error isn't the root cause. `cdk deploy $STACK --verbose`, then `cdk --unstable=diagnose diagnose $STACK` (CLI ≥ 2.1120.0); else `aws cloudformation describe-events --stack-name $STACK --filters FailedEvents=true` — the first `_FAILED` event is the cause. Details
NoCredentials / ExpiredToken / AssumeRoleFailed	`aws sts get-caller-identity` + `cdk doctor`. Expired SSO, missing `env`, missing `sts:AssumeRole`. Details
Asset errors (CannotFindAsset, FailedToBundleAsset, AssetBuildFailed, AssetPublishFailed)	Path wrong, Docker not running, or bootstrap bucket perms. Use `path.join(__dirname, ...)`. Details
AppRequired	Add `"app": "npx tsx bin/my-app.ts"` to `cdk.json`. Details
AnnotationErrors	Fix the underlying issue; suppress with `NagSuppressions` only as last resort. Details
ConcurrentReadLock / ConcurrentWriteLock	`rm -rf cdk.out` then re-run. Parallel CI: `--output ./cdk.out.$BUILD_ID`. Details
BootstrapVersionValidation	Re-bootstrap. Match `--qualifier` everywhere. Details
DependencyCycle	Extract shared resource into third stack or use SSM for late-binding. Details
UnresolvedAccount	Set explicit `env: { account, region }` on stack. Commit `cdk.context.json`. Details
NoStacksMatched	CDK uses logical ID (2nd constructor arg), not CFN name. `cdk list` to find IDs. Details
Cannot find module (synth time)	Run `npx tsc --noEmit`, check `cdk.json` app path matches `tsconfig.json` `outDir`, delete stale `.js` files. Python: activate venv. Details
V1 import paths / duplicate aws-cdk-lib	V1 `@aws-cdk/*` imports, wrong `Construct` import, duplicate lib copies in monorepos. Details
Lambda Cannot find module (runtime)	Wrong handler value, missing SDK v3 migration, Python deps not bundled. Details
API Gateway multi-stage conflicts	Set `deploy: false` on `RestApi`, create `Deployment` and `Stage` explicitly. Details

aws-cdk

Install options

Review the source files

AWS CDK

Overview

Critical Warnings

AWS CDK

Overview

Critical Warnings

Common Workflows

Troubleshooting

Construct Patterns

Additional Resources

Security Considerations

aws-cdk

Source facts

Install options

Review the source files

More from this repository

AWS CDK

Overview

Critical Warnings

More from this repository

AWS CDK

Overview

Critical Warnings

Common Workflows

Troubleshooting

Construct Patterns

Additional Resources

Security Considerations