You have probably seen a file named “go.sum” in almost every Go project you have worked on. You may have even seen it change every time you run “go mod tidy”. But do you actually know what it does? It is one of those files that works silently in the background, and some developers never stop to think about it. The “go.sum” file is one of those files you never really interact with directly, but it
Why I Stopped Using MediatR and Built CQRS From Scratch in .NET 10 MediatR is a great library. I'm not here to trash it. But when it moved to a paid model for commercial use, a lot of teams — including mine — had to make a decision. And the more I looked at what MediatR actually does under the hood, the more I realised: this is not complicated enough to justify an external dependency. So I built