Last week, AWS announced (docs, blog) event filtering for Lambdas reading from SQS, DynamoDB, and Kinesis. Lambda’s new filtering is consistent with EventBridge’s. Also announced was faster, slicker, cheaper S3/EventBridge integration. These features rely on software I helped write. The problem turns out to be more interesting than you might expect, by a factor of 10¹² or so. I think it’d be really great if the code were open-sourced...