Lambda handlers can become hard to understand & change. The reason is that the handler logic can complect multiple orthogonal concepts: - the logic for parsing & validating input - the logic for getting configurations, such as from AWS Parameter Store or AWS Secrets Manager - the logic for getting db connection - the logic for serializing the output & errors Having multiple intertwined concepts makes things hard: we first needed to understand this complex thing before we could improve it. This applies for new projects/lambdas as well. These braids can be elegantly decomplected using a middleware, such as [middy][middy]. With middy, you can transform the handler's boilerplate into reusable & [[Decomplecting intertwined things|simple lego bricks]]. The handler became simpler & easier to understand #typescript #serverless [middy]: https://github.com/middyjs/middy