Add getNeoFormVersion and getMcpVersion getters to make Kotlin happy.

src/legacy/java/net/neoforged/moddevgradle/legacyforge/dsl/LegacyForgeExtension.java

@@ -3,8 +3,10 @@
 import javax.inject.Inject;
 import net.neoforged.moddevgradle.dsl.DataFileCollection;
 import net.neoforged.moddevgradle.dsl.ModDevExtension;
+import net.neoforged.moddevgradle.internal.ModDevArtifactsWorkflow;
 import net.neoforged.moddevgradle.legacyforge.internal.LegacyForgeModDevPlugin;
 import org.gradle.api.Action;
+import org.gradle.api.InvalidUserCodeException;
 import org.gradle.api.Project;
 
 /**
@@ -49,6 +51,18 @@ public void setMcpVersion(String version) {
         });
     }
 
+    /**
+     * After enabling modding, you can retrieve the version of MCP you picked using this getter.
+     * This getter will throw if you have not enabled vanilla-mode yet.
+     */
+    public String getMcpVersion() {
+        var dependencies = ModDevArtifactsWorkflow.get(project).dependencies();
+        if (dependencies.neoFormDependency() == null) {
+            throw new InvalidUserCodeException("You cannot retrieve the MCP version without setting it first.");
+        }
+        return dependencies.neoFormDependency().getVersion();
+    }
+
     public void enable(Action<LegacyForgeModdingSettings> customizer) {
         var plugin = project.getPlugins().getPlugin(LegacyForgeModDevPlugin.class);
 

src/main/java/net/neoforged/moddevgradle/dsl/ModDevExtension.java

@@ -159,7 +159,7 @@ public void addModdingDependenciesTo(SourceSet sourceSet) {
 
     /**
      * After enabling modding, you can retrieve the version of the modding platform you picked using this getter.
-     * I.e. the NeoForge or Forge version. If you chose to enable vanilla-only mode, this getter returns null.
+     * I.e. the NeoForge or Forge version. If you chose to enable vanilla-only mode, this getter will throw.
      */
     public String getVersion() {
         var dependencies = ModDevArtifactsWorkflow.get(project).dependencies();

src/main/java/net/neoforged/moddevgradle/dsl/NeoForgeExtension.java

@@ -1,8 +1,10 @@
 package net.neoforged.moddevgradle.dsl;
 
 import javax.inject.Inject;
+import net.neoforged.moddevgradle.internal.ModDevArtifactsWorkflow;
 import net.neoforged.moddevgradle.internal.ModDevPlugin;
 import org.gradle.api.Action;
+import org.gradle.api.InvalidUserCodeException;
 import org.gradle.api.Project;
 
 /**
@@ -50,6 +52,19 @@ public void setNeoFormVersion(String version) {
         });
     }
 
+    /**
+     * After enabling modding, you can retrieve the version of NeoForm you picked using this getter.
+     * This is only meaningful if you have enabled vanilla-only mode or if you have overridden NeoForm for NeoForge.
+     * This getter throws if no NeoForm version was set.
+     */
+    public String getNeoFormVersion() {
+        var dependencies = ModDevArtifactsWorkflow.get(project).dependencies();
+        if (dependencies.neoFormDependency() == null) {
+            throw new InvalidUserCodeException("You cannot retrieve the NeoForm version without setting it first.");
+        }
+        return dependencies.neoFormDependency().getVersion();
+    }
+
     public void enable(Action<ModdingVersionSettings> customizer) {
         var modDevPlugin = project.getPlugins().getPlugin(ModDevPlugin.class);
 

src/test/java/net/neoforged/moddevgradle/internal/ModDevPluginTest.java

@@ -119,7 +119,7 @@ void testEnable() {
         @Test
         void testGetVersion() {
             extension.setNeoFormVersion(VERSION);
-            assertEquals(VersionCapabilitiesInternal.ofNeoFormVersion(VERSION), extension.getVersionCapabilities());
+            assertEquals(VERSION, extension.getNeoFormVersion());
         }
 
         @Test

src/test/java/net/neoforged/moddevgradle/legacyforge/LegacyModDevPluginTest.java

@@ -1,6 +1,7 @@
 package net.neoforged.moddevgradle.legacyforge;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import java.util.Set;
@@ -57,6 +58,12 @@ void testEnableVanillaOnlyMode() {
                         "build/moddev/artifacts/vanilla-1.17.1-client-extra-aka-minecraft-resources.jar",
                         "de.oceanlabs.mcp:mcp_config:1.17.1[net.neoforged:neoform-dependencies]",
                         "build/moddev/artifacts/intermediateToNamed.zip");
+        assertEquals("1.17.1", extension.getMcpVersion());
+    }
+
+    @Test
+    void testGetMcpVersionThrowsBeforeEnabling() {
+        assertThrows(InvalidUserCodeException.class, extension::getMcpVersion);
     }
 
     @Test