serverless VS aws-multi-account-viewer

I don't know any tutorials that cover all of these, but check out: https://cdkpatterns.com/ for 1) https://docs.aws.amazon.com/cdk/v2/guide/cdk_pipeline.html for 2) 3) and 5) https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-cdk-testing.html for 4)

I would like to see re-useable design patterns advocated similar to the terraform/terragrunt modules concepts. Encouraging pulumi.ComponentResource definitions multi environment structure, best practices. The cdk guys have something similar https://cdkpatterns.com/.

While writing this post, the four stacks combined are 129 lines of source code. With the help of the CDK Constructs that are being used this translates to over 1k lines of code in CloudFormation. We are only using L2 constructs here – there is way more constructs available that you can use in the Constructs Hub and also a lot of guidance regarding the usage of CDK over at CDKPatterns.

I use the "Lambda-lith" pattern, primarily because I am using Rust and deploying via CI/CD (codepipeline).

Here is a read of common lambda design pattern https://github.com/cdk-patterns/serverless/blob/main/the-lambda-trilogy/README.md

Level 3 constructs are opinionated units of reusable code which often deliver a service. Open source level 3 constructs are available from AWS Solutions Constructs - an extension to the CDK, CDK Patterns - a library of well-architected patterns, Construct Hub - a library of open-source constructs and some even come out of the box with the CDK - these are appended with 'patterns' to make them identifiable. Two examples are shown below:

I’m not sure I fully understand the question but this repo might help (uses lambda -> sqs -> lambdas) basically fan out shit load of lambdas as needed: https://github.com/awslabs/aws-multi-account-viewer/blob/master/Back-End/lambdas/send_sqs_message.py