Ask HN: What are some quality of life patterns you develop into your projects?

So what are somethings you have built solely for QoL? In my past I've:

- built a nice debugging log system - developed a small library of copy and pastable examples to use in the REPL - have some boiler plate scripts that setup everything - developed the SQL scripts for creating a local copy of a db in a particular state - a controlable caching system for local development