[hughgrigg]

The three Lambda functions Rainlytics deploys now run on nodejs24.x. They are SummaryFunction, ReportFunction and the report notification publisher (in both its forms, the default code from this package and a site's own entry bundled through NodejsFunction). Node 24 is the newest runtime Lambda supports in production (nodejs26.x is still a preview outside the SLA). A managed runtime in Auto mode takes patch releases itself, so the family is the only thing a construct pins, and the Node 22 family keeps a site's analytics functions behind the rest of its stack. All three handlers are already async, which nodejs24.x requires now that it has dropped callback-style handlers. A site writing its own publisher with reportNotificationHandler gets an async one from that helper.

The package's own Node floor stays at 22. engines, the CI matrix, the getting-started page and the esbuild target for the command line describe the machine a consumer runs CDK and the CLI on, and none of them describes a Lambda runtime.

A site takes the new runtime on its next deploy after upgrading. CloudFormation updates each function in place.

• Conventional commit message, used as the title
• Conventional branch name, like feat/concise-description
• Full check with pnpm run check passed
• Rebased off latest main
• User-facing behaviour is documented in docs/

The docs name no Lambda runtime, so nothing there changes.

@coderabbitai ignore

Written by Claude.