I’m pulling events from SQS in an infinite loop and wanted to make sure that if something goes wrong, the loop restarts. It seems though that I can’t make things break because the http client behind the scenes also does retries and backoff etc, so I wonder if that’s guaranteed behaviour?

If you're talking about the aws-api, you can supply your own retriable? and backoff functions: https://cognitect-labs.github.io/aws-api/cognitect.aws.client.api-api.html#cognitect.aws.client.api/client