cdk validate adds an unstable online mode

Introduced 2026-06-15 · score 0.93

HOW TO USE IT

When checking a CDK project's configuration online, run `cdk validate --online` with the `validate` unstable feature enabled.

WHY THIS HELPS

Validate a CDK project online when checking its configuration.

REQUIREMENTS AND LIMITATIONS

• Version: 2.1127.0
• --unstable=validate (required): Opts in to the unstable `validate` command; the CLI global option takes a feature name.
• --online (required): Enables online validation. The official documentation found does not detail this flag's behavior or parameters.
• Prerequisite: Use an AWS CDK CLI version that includes `cdk validate`; the release note introduces the command in v2.1127.0.
• The `cdk validate` command is behind the `--unstable` flag.

FIRST-PARTY EVIDENCE

• https://github.com/aws/aws-cdk-cli/releases/tag/aws-cdk%40v2.1127.0
• https://github.com/aws/aws-cdk-cli/blob/main/packages/aws-cdk/README.md

Check the installed version and the source before using it. Entry JSON

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