Use this thread to ask questions about modding, share findings on interacting with the API/engine/DB, and perhaps ask Kyle questions about the above if he's wanting to share. Kyle gave us this modding support so we might as well start putting it to good use!
Before anything else, make sure to grab a copy of Godot from
https://godotengine.org/ , it's free, and it's the engine Quasar was written in. If you want to load up the examples, make sure to import the folder \[quasardirectory]\mods\examples to get started.
Additionally, given how Database involved Q4X is, i'd also recommend getting a database viewer, such as Database Browser for SQLite, as understanding the internal structure of the database might be crucial for any mod that changes ingame elements. I'd strongly recommend not implementing mods through the database directly, and instead use the API, as you can make sure your changes are reversible with it. Always back things up before making changes, too!