For folks here I strongly recommend installing the appdaemon integration and just writing python scripts. The downside is there is a good bit of learning curve and time investment just to get the hello world going (turn on a light at sunset?).

Once you are there, you can write shared libraries, abstract away whatever you want, have legit tests, and just do anything you would normally want in your coding environment (vscode, auto-formatters, source control, etc). Obviously not the right recommendation for a consumer system, but if you are like me and feel more comfortable with a programming language, it's the way to go.