This part will change entirely once we have a proper project template for C#.

For now use either of these methods:

Build JavaBridge from source

Pull the JavaBridge repository, and then start the minecraft client. The .bridgeStartup should be in the mods directory of the game, so the JavaBridge recognizes it and can import resources.

While the JavaBridge is starting, start up your Mod project. The ModHostBridge will wait for the JavaBridge to be available.

Installing the JavaBridge mod

This is pretty much exactly the same as the above method, but instead of building the JavaBridge mod, you just install it like a regular mod, and then start your fabric client.

While it is starting up, you can start your Mod project at the same time.