This is exactly what I'm aiming for: Being agile and delivering value faster by utilizing a healthy code base.

Watch the video. It's under 8 minutes long.

You can learn a ton from all kinds of practices since they aren't build for a specific tool or language. If you happen to develop for the Apple platforms I highly recommend to look into @qcoding work.
https://iosdev.space/@qcoding/115697870777263482