but please don’t hard-code ~/.config or $HOME/.config. Use the XDG_CONFIG_HOME environment variable, with $HOME/.config as a fallback if it’s not set.

Many programming languages have a cross-platform implementation of this built in to their standard library. C# has Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) which uses XDG_CONFIG_HOME on Linux, local AppData on Windows, and whatever is the correct thing on MacOS (not very familiar with how things work on MacOS)

Attention electron developers: under no circumstances do I want your entire app in .config.

Use xdg-ninja to help clear out unwanted files not in your home folder, and give tips to move them into a normal folder like .config

Just give me ~/etc/

Laughs in NixOS