Depending on your preferred workflow you would typically have a tiny loader stub in a .lua file that you never need to touch and all of your code in Fennel. You

Depending on your preferred workflow you would typically have a tiny loader stub in a .lua file that you never need to touch and all of your code in Fennel. You can still add third party Lua libraries if you desire and seamlessly call back and forth between these and your Fennel code. You can even have a live REPL to eval code in your running Löve session.