I stopped rebuilding the same .NET backend every project (here’s what changed)

A couple of years ago, every new .NET project I started looked exactly the same. The first few days were always the same routine: set up JWT auth add roles figure out refresh tokens recreate the folder structure It felt productive at the time. But looking back, it was just repetition. The worst part wasn't even the time I lost. It was the same small mistakes that kept coming back over and over: auth edge cases inconsistent structure across projects temporary decisions that somehow stayed forever