fabric/src/main/resources/mod.json

{
  "id": "fabric",
  "name": "Fabric API",
  "version": "0.0.2",
  "side": "universal",
  "initializers": [
  ],
  "mixins": {
    "client": "net.fabricmc.fabric.mixins.client.json",
    "common": "net.fabricmc.fabric.mixins.common.json"
  }
}