This looks pretty cool! However I feel that if the README starts with "Drop-in replacement for X", it should also start with "Why use this over X".

I do like the idea of saving prompts for projects like these (Which is also where the above question is answered: "Creating an MIT-licensed wrapper around Moto that has 100% feature parity with Localstack." [0] Which (i assume) is motivated by the recent changes to Localstack's distribution model [1])

[0] https://github.com/robotocore/robotocore/blob/main/prompts/2...

[1] https://blog.localstack.cloud/the-road-ahead-for-localstack/