Instance Default settings option for helper mods

src/core/@types/javaApi.d.ts

@@ -751,6 +751,7 @@ export interface InstanceSettings {
     memory: number;
     fullscreen: boolean;
     updateChannel: string;
+    preventMetaModInjection: boolean;
     javaArgs: string;
     shellArgs: string;
     programArgs: string;

src/views/Settings/InstanceSettings.vue

@@ -66,6 +66,15 @@
     </div>
 
     <p class="block text-white-700 text-lg font-bold mb-4">Java</p>
+
+    <ui-toggle 
+      label="Disable helper mod injection"
+      desc="The FTB App will inject helper mods into your instance to help the app and your instance work together. Sometimes this can cause issues with Minecraft, Mods, Etc. You can disable this behaviour here." 
+      v-model="localSettings.instanceDefaults.preventMetaModInjection" 
+      class="mb-4" @input="() => {
+        saveMutated()
+      }" />
+
     <ram-slider class="mb-6" v-model="localSettings.instanceDefaults.memory" @change="saveMutated" />
 
     <div class="flex gap-4 items-end">

subprocess/src/main/java/net/creeperhost/creeperlauncher/data/InstanceJson.java

@@ -66,7 +66,7 @@ public class InstanceJson {
      * When enabled, the app will not inject mods from the meta.modpacks.ch system. Sometimes these can 
      * cause issues, so it's good to let the user have the option to turn them off
      */
-    public boolean preventMetaModInjection = false;
+    public boolean preventMetaModInjection = Settings.getSettings().instanceDefaults().preventMetaModInjection();
 
     public byte packType;
     // TODO migrate this to `isPrivate`

subprocess/src/main/java/net/creeperhost/creeperlauncher/storage/settings/Settings.java

@@ -200,6 +200,7 @@ private SettingsData migrate() {
                     getOrDefault("memory", Integer::parseInt, DEFAULT_SETTINGS.instanceDefaults().memory()),
                     getOrDefault("fullscreen", Boolean::parseBoolean, DEFAULT_SETTINGS.instanceDefaults().fullscreen()),
                     getOrDefault("updateChannel", DEFAULT_SETTINGS.instanceDefaults().updateChannel()),
+                    getOrDefault("preventMetaModInjection", Boolean::parseBoolean, DEFAULT_SETTINGS.instanceDefaults().preventMetaModInjection()),
                     getOrDefault("jvmargs", DEFAULT_SETTINGS.instanceDefaults().javaArgs()),
                     getOrDefault("shellArgs", DEFAULT_SETTINGS.instanceDefaults().shellArgs()),
                     "" // There is no existing setting for this

subprocess/src/main/java/net/creeperhost/creeperlauncher/storage/settings/SettingsData.java

@@ -99,6 +99,7 @@ public static SettingsData createDefault() {
                 computeRecommendedInstanceRam(),
                 false,
                 "release",
+                false,
                 String.join(" ", MOJANG_DEFAULT_ARGS), 
                 "",
                 ""
@@ -200,16 +201,18 @@ public static final class InstanceSettings {
         private int memory;
         private boolean fullscreen;
         private String updateChannel;
+        private boolean preventMetaModInjection;
         private String javaArgs;
         private String shellArgs;
         private String programArgs;
 
-        public InstanceSettings(int width, int height, int memory, boolean fullscreen, String updateChannel, String javaArgs, String shellArgs, String programArgs) {
+        public InstanceSettings(int width, int height, int memory, boolean fullscreen, String updateChannel, boolean preventMetaModInjection, String javaArgs, String shellArgs, String programArgs) {
             this.width = width;
             this.height = height;
             this.memory = memory;
             this.fullscreen = fullscreen;
             this.updateChannel = updateChannel;
+            this.preventMetaModInjection = preventMetaModInjection;
             this.javaArgs = javaArgs;
             this.shellArgs = shellArgs;
             this.programArgs = programArgs;
@@ -234,6 +237,10 @@ public boolean fullscreen() {
         public String updateChannel() {
             return updateChannel;
         }
+
+        public boolean preventMetaModInjection() {
+            return preventMetaModInjection;
+        }
 
         public String javaArgs() {
             return javaArgs;