the issue was proguard not knowing what obfuscated minecraft looks like.

.forgejo/workflows/build-client.yml

@@ -26,7 +26,9 @@ jobs:
       run: ./gradlew Client:build
     - name: Obfuscate Broadway
       if: github.ref == 'refs/heads/release'
-      run: bash mobf.sh Client/build/libs/BaseBand-Broadway.jar
+      run: |
+        ./gradlew Client:proguardRelease
+        bash mobf.sh Client/build/proguard/BaseBand-Broadway.jar
 
     - name: Upload DSM
       uses: forgejo/upload-artifact@v4
@@ -38,7 +40,7 @@ jobs:
       uses: forgejo/upload-artifact@v4
       with:
         name: BaseBand-Broadway.jar
-        path: Client/build/libs/BaseBand-Broadway.jar
+        path: Client/build/proguard/BaseBand-Broadway.jar
     - name: Release to server
       if: github.ref == 'refs/heads/release'
       env:
@@ -47,5 +49,5 @@ jobs:
         BB_HOST: ${{ vars.BB_HOST }}
         BB_PORT: ${{ vars.BB_PORT }}
         BB_PATH: ${{ vars.BB_PATH }}
-      run: bash push_file.sh Client/build/libs/BaseBand-Broadway.jar 3849
+      run: bash push_file.sh Client/build/proguard/BaseBand-Broadway.jar 3849
 

.run/BaseBandRewrite [build-full].run.xml

@@ -35,7 +35,8 @@
       <option name="taskNames">
         <list>
           <option value="build" />
-          <option value="Loader:proguard" />
+          <option value="proguard" />
+          <option value="proguardRelease" />
         </list>
       </option>
       <option name="vmOptions" />

Client/build.gradle

@@ -174,7 +174,11 @@ tasks.register('proguard', ProGuardTask) {
     injars jar.archiveFile
     outjars "${proguardBuildDir}/BaseBand-${devName}.jar"
     libraryjars "${proguardDir}/rt.jar"
-    libraryjars configurations.compileClasspath
+    libraryjars configurations.compileClasspath.resolve().collect() {
+        if(it.getName().contains("mapped_stable")) {
+            return new File("build/fg_cache/net/minecraftforge/forge/1.12.2-14.23.5.2860/forge-1.12.2-14.23.5.2860-mci.jar")
+        } else return it;
+    }
     dump "${proguardBuildDir}/dump-${devName}.txt"
     printmapping "${proguardBuildDir}/mapping-${devName}.txt"
     printconfiguration "${proguardBuildDir}/configuration.txt"
@@ -188,7 +192,11 @@ tasks.register('proguardRelease', ProGuardTask) {
     injars tasks.releaseJar.archiveFile
     outjars "${proguardBuildDir}/BaseBand-${releaseName}.jar"
     libraryjars "${proguardDir}/rt.jar"
-    libraryjars configurations.compileClasspath
+    libraryjars configurations.compileClasspath.resolve().collect() {
+        if(it.getName().contains("mapped_stable")) {
+            return new File("build/fg_cache/net/minecraftforge/forge/1.12.2-14.23.5.2860/forge-1.12.2-14.23.5.2860-mci.jar")
+        } else return it;
+    }
     dump "${proguardBuildDir}/dump-${releaseName}.txt"
     printmapping "${proguardBuildDir}/mapping-${releaseName}.txt"
     printconfiguration "${proguardBuildDir}/configuration.txt"

Client/proguard/proguard.cfg

@@ -16,8 +16,6 @@
 -ignorewarnings
 #-overloadaggressively
 
--keep @interface ** { *; }
-
 # keep things meant to exist in prod
 -keep class com.baseband.prod.** { *; }
 -keep class com.baseband.client.mixin.** { *; }
@@ -29,21 +27,8 @@
 }
 
 # jna
--keep class com.sun.** { *; }
--keep class oshi.** { *; }
-
-# spongepowered
--keep class org.** { *; }
-
-#tuddo
--keep class de.** { *; }
-
-# javassist
--keep class javassist.** { *; }
-
-# javassist
--keep class net.** { *; }
+-keep class !com.baseband.**,!de.tudbut.security { *; }
 
 # Also keep - Enumerations. Keep the special static methods that are required in
 # enumeration classes.
--keepclassmembers enum ** { *; }
+-keepclassmembers enum * { *; }

Client/src/main/java/com/baseband/client/gui/GuiRewrite.java

@@ -39,6 +39,7 @@ public class GuiRewrite extends GuiScreen {
     }
     
     // The initiator; this can, for some reason, not be in the constructor
+    @Override
     public void initGui() {
 
         // Minecraft wants this
@@ -86,6 +87,8 @@ public class GuiRewrite extends GuiScreen {
     // When ESC is pressed
     @Override
     public void onGuiClosed() {
+        BaseBand.LOGGER.info("Hiding GUI");
+
         super.onGuiClosed();
         Features.getFeature(ClickGUI.class).setEnabled(false);
         for (Category category : categories) {

push_local.sh

@@ -10,5 +10,5 @@ if [ "$BB_PATH" = '' ] ; then
 fi
 
 bash push_file.sh Server/build/libs/BaseBand-Server.jar
-bash push_file.sh Client/build/libs/BaseBand-Broadway.jar
+bash push_file.sh Client/build/proguard/BaseBand-Broadway.jar
 bash push_file.sh Loader/build/proguard/BaseBand-Loader.jar